Man I laughed too hard at this

In an even stranger paradox, a lot of people seem very invested in the physical health of other people, whom they have no connection to; people they likely have no idea who they even are. And yet, oddly, they're not invested even remotely in these peoples' mental health

I'm invested in putting an end to the glorification of self-harming behaviors, because we live in a society.

In what way are you invested, though? For example, mocking people is not an investment in their well-being. In fact, it is very likely to lead to self-harming behaviours.
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So far no one on this post has attempted to glorify her

I've done some digging, and I'll be the first to glorify Chrissy Metz, for the strong woman she is, especially considering the struggles she's faced in her life. She's developed a lot of self-control and made a lot of mind-and-body-positive changes in her life:
https://www.stylecraze.com/articles/chrissy-metzs-weight-loss-journey/#gref
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I'm invested in not glorifying fat acceptance, because heart disease kills more Americans than cancer every year. Type 2 diabetes sits in my family (I would say it runs in the family, but...), and I think it's a shame that I will eventually have to explain to my children that being fat is a bad choice.
To be clear, I don't advocate mocking or disparaging. I advocate radical candor—caring enough about a person to tell them the truth. If someone's fly is down, you tell them, and they say thanks. If someone is morbidly obese, you tell them and now you're a judgmental bigot who should keep to themselves. I think there's something wrong with that.

^That's a much bigger comment than I meant to write.

@unklethan but I'm glad you did. It was worth the read

She knows that she is morbidly obese, that’s the different. Good comment, though.

I am invested in other people's health because it is almost certain that - directly or indirectly - some of my tax money has been used to fund healthcare for people that are ill because of their own life choices
According to a Google search, in 2014 62% of adults in the UK were overweight
I don't mind paying taxes for accident and emergency (as a general rule) but I believe that most people who become as obese as this woman need to seriously consider the consequences

Considering you seem to be responding to my statement, which had to do with people mocking the obese under the guise of caring about their health, my response is:
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Alright, so exactly HOW are you invested? Are you sponsoring training programs? Offering advice/support? Calling regularly to check up? Getting a medical degree? Making healthier foods more affordable?
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I also assume you're also prepared to take on women who wear stilletos regularly, men who don't exercise on the regular, children who are on electronic devices all day, people who don't wear sunscreen, etc etc etc, all of which are proven to have long lasting medical impacts.
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As a side note, this particular woman is one of the leads on what has ended up being a fairly popular TV programs, just starred in a movie, and seems to have a singing thing going for her as well, so she it's highly likely she is not exactly a good example of people taking advantage of tax money

I'll re-iterate my main point "some of my tax money has been used to fund healthcare for people that are ill because of their own life choices"

I'll reiterate my main point: "how exactly are you working to make this better?"
Because if you're NOT, then lashing out at them is hardly rational behaviour, especially when you're not lashing out at every single other behaviour that contributes to an unhealthy lifestyle in equal measure

How did I lash out?

So far you haven't, but as I explained before if your comment was meant to be responding to mine, the context of my statement had to do with people mocking the obese under the guise of caring about their health

My comment was partly in response to yours
I'm not directly commenting on the mockery though
As for what am I doing in regards to obesity, that's not the point. I am not responsible for other's poor life choices
I give advice if asked. I'd like to think I know a considerable amount about health and fitness
But that's irrelevant to my main point, which is that some of my tax money is used to fund healthcare for people that are largely to blame for their health problems and I can do very little about it
I have a moral issue with that. Most people are unaware of the widespread effects their poor life choices have on others

Only mildly related, but I read an article a few months ago about sunscreen users having high risk of a host of other complications that result from vitamin D deficiency— higher than a a non-sunscreener's risk of malignant cancer.
*Will search for sources upon request*