Ask HN: Do we still need browsers?

Yesterday it's been discussed about AMP protect and now seems clear to me that restricting access to publishers equals to better experience for the user --along w publishers not having a revenue stream (side note: that's another big problem and probably needs to be part of this conversation, but I'll purposely leave that aside just to focus on the user's POV)

This also could explain the ad blocker rise, which is just restricting access to publishers.

So the idea that came to me was, why do we need to consume publishers' content using regular browsers?

More so this question leads to: why do we new to use gmail client to use gmail servers?

Could browsers allow to choose what client code will load whenever I access facebook.com?

Do we need a new breed of browsers? Or can they evolve into this?