It’s never for the right reasons

Ok. And what about it?

The point is that now that's legal, corporations can "support" it exploitatively purely for marketing without fear of shareholder repercussions.
It just happens that this is only the first or second pride month since.

That was pointed out in the post, yes.

Most other Western countries “legalized” Gay marriage in the early 2000’s. The US is super late to the party.
(“Legalized” implying it had no right to being “illegal” in the first place)

You're right. But even the early 2000's was fairly recent.