The SEO limitation has been a real limitation for a long time.
But a new feature added recently can mitigate the problem: Serve anything, anywhere on your domain, with @anvil.server.route()
The new feature is still incomplete, and getting your app to play nice with SEOs will take some effort, but the limitation is finally disappearing.
So at this point I would say that this really qualifies for a content suggestion, rather than feature request.