Fair points but largely irrelevant. My issue is not with limits of imagination, I can imagine plenty of uses that this device might do, but cannot. Flat earthers and anti evolutionist do not suffer from lack of imagination but from lack of understanding. Quite different and comparing my point to this viewpoint is very insulting and misses the key point I was making.
The issue I have is that the iPad as currently implemented, which includes its software, does not require an M4 but might if Apple have a different destiny for device. I use my iPads a lot, but I have no way to make them do what I would like. And you are correct, the average iPad Pro user is not the average iPad user, but they are severely limited by the current implementation of iPadOS. An M4 will not help until there is a fundamental rethink in the way an iPad works, Pro or not. Try not to be so judgmental please.