No idea what the worlds coming to when I agree with you, but here we are.You’re starting to get it. I don’t want “pro” apps for iPad. Universal control is exactly the type stuff I want Apple focusing on. The only way an iPad could replace anything is to come with macOS which obviously isn’t happening.
And nope you don’t need an iPad Pro unless you just want the most premium iPad you can buy. That’s what apple means with Pro.
You’re wrong a little too though, plenty of pros can use the iPad on its own, and do.
But it truly depends on what you do.