I can’t see any reason to use any other view than the “rider’s perspective” (i.e., equivalent to a “first person shooter” view) which I think is view #4 (right after “looking backwards”). I don’t see any other view making sense for a serious cyclist doing a hard workout?
If each workout just STARTED in this view it would save me (and probably a lot of others?) a few minutes (at least) from every workout.
The most annoying aspect of starting every workout is pairing my phone’s Zwift app with my laptop so that I can change the view. That is often the only time I need to use the app. (because I have multiple wifi networks so must check laptop and phone settings to make sure they are connecting to same SSID, etc.).