Anchor Text Diversity - Does Proper/Lower Case Matter?

When I take a look at Google's Q&A snippets, it seems like Google cannot read at all, just scrape everything together.

Of course, when we look at big sites in Ahrefs there's a wide variation of the same anchors, especially the branded ones, including misspellings. But again, it seems Google cannot read, and 100% re-building those organic link profiles isn't possible obviously.

So, does adding proper/lower case variations of the keywords do anything?

personally, I do mind upper/lower cases but that's because several years ago when I have started using this trick it mattered. I'm not sure whether it still matters today, but - like I said - I got used to it, so I'll keep doing it

I personally think gives you more diversification in your anchors and besides if you think about it same happens with linux lower and upper case are 2 different commands.