The nice thing about this is that you can use a runtime like cloud run or lambda and allow that runtime to scale based on http requests and also scale to zero.
Setting up autoscaling for workers can be a little bit more finicky, e.g. in kubernetes you might set up KEDA autoscaling based on some queue depth metrics but these might need to be exported from rabbit.
I suppose you could have a setup where your daemon worker is making http requests and in that sense "push" to the place where jobs are actually running but this adds another level of complexity.
Is there any plan to support a push model where you can push jobs into http and some daemons that are holding the http connections opened?