I'd argue the reason archiving is seen as bad to social media addicts is also because to quote someone else, the internet (and culture as a result of forced change) has changed decades in the span of a few years. I mean look how pronouns went from being in Tumblr bios and laughed at to in your parents work e-mail. I mean 10 years ago this would be a skit satirizing hipsters by some YouTube channel, in fact I saw a CollegeHumor skit with the same exact premise:
https://www.youtube.com/watch?v=iBRtucXGeNQFurthermore if you criticize the orthodoxy you are prone to being marked to have your life/career ruined by Twitter users. To make matters worse, plenty of NPCs have no real core values other than "what will make me get ahead in life/online". So some people will do this to try to whitewash their internet past for a new crowd or to avoid being fired.
Of course this also leads to hilarious situations. Let's look at one community I have knowledge with; the furry fandom. Zoomer furries will call you a zoophile in the same way Twitter addicts will call you a pedophile for liking anything anime if you like quadruped characters. Also not even 10 years ago, the biggest cartoon and online fandom was about literally just that (My Little Pony), and don't get me started on the Pokemon fandom and eeveeloutions.
So someone I know would go on the profiles of people who would bitch about it and tried to whitewash their profiles of it, find favorites on art sites of MLP or Pokemon porn, and share them to their friends with burner accounts and watch drama unfold. This sounds crazy, but furries will crusade over why people should be canceled for everything and then end up having "cancel" worthy shit in their history, and then give into the temptation of saying something instead of learning to shut up.