Just because people change it doesn't mean they are weak

I try my best to do this but it’s really hard, hoomanz don’t like changing opinions

And just because I don't agree with you doesn't make me stubborn or a dumbass

I do it all the time; the issue is learning when to recognize such things. If you have a bad opinion about a topic then think of why you have such an opinion. If you cannot think of any good reasons then change your opinion on the matter to better reflect what you've learned. It's why I am no longer a determinist and support the death sentence.