It's really not difficult be a decent person, and if you do make a mistake, a genuine apology is usually all you need to make things right.
People aren't offended because Vaxry made a mistake, it's because he doesn't admit and apologize for his mistakes. Instead he goes out of his way to justify his behavior, the discord mod's, and the general transphobic culture in his server.
I'm 100% certain that if Vaxry just said something like "yeah I'm sorry about what happened, we won't tolerate transphobia in our discord server from now on" (and actively enforced that) after Drew dropped his blog post, he wouldn't be banned from freedesktop and we wouldn't be having this discussion.
But then you could ask the same question again. Why install (K)ubuntu if you're gonna get rid of snaps anyway.
If you want Plasma with an Ubuntu-based OS without snaps, your best option is probably TuxedoOS (unlike Kubuntu they're already on Plasma 6 too).