There's a bunch to unpack here...
The idea of dogpiling being "inevitable" is a complex one. It does indeed happen, and it's true that quote post would make it more difficult to mute such conversations, but as you correctly point out, it's already possible to simply embed a URL and have the same essential effect.
At the same time, as we see on Twitter, quote tweets also have a great deal of value, value that's simply not possible to capture here right now.