They've done the user centric research & every user says they want to be able to change what they say online & escape their bad mistakes. The team has resounding data pushing them this direction. And it will be immensely immensely detrimental to the platform/service/medium.
It's like the "Hidden replies" feature [0]. Sure someone can maliciously use it to hide valid criticism. But in doing so, they're essentially doing a public curation of "these are the replies which really rankled me"
[0] https://techcrunch.com/2019/11/21/twitter-rolls-out-its-hide...
i.e. more like a built-in 'delete and re-post', but with preserved metrics.
Facebook Groups: member-visible changelog
Reddit: you can edit the comment within 3 minutes with no "edited" sticker, but after 3 minutes if you edit then the comment's timestamp gets an asterisk next to it.