@grishka @renchap Multiple reasons. The ones I see:

-it might not be the only time a post is quoted. Quoting a post is starting a conversation, being able to reply makes it a fairer dialogue.

-character limits: there's not always enough space.

-that's simply not elegant, it's confusing in the original feed and all other places where people have no idea about the quote post. It makes the experience for everyone not reading the quote post worse.