If you're posting anything online, it's impossible to guarantee deletion of it. Anyone can scrape anything and store it anywhere for however long they want.
How did you come to this conclusion from the meme?
Does it not literally imply the opposite? "Trans people have to do everything perfectly to get respected, while cis people can do anything and will never get misgendered."
Why would a trans person want the above? What's your thought process?
I think the comment you're replying to is not talking about late Reddit refugees but early FOSS enthusiast that were on Lemmy before. You're missing the point.
You mean LGPL when you say AGPL, right?