The advantages of the M1 Max over the M1 are fairly well documented, especially in regard to video editing.

Bottom line is that if you do enough of it then the performance increase more than pays for itself. If not, then, well, guess you don't need it after all.

And not sure why someone would buy an M1 MP AND a M1 mini. It's fairly obvious that an M1 is an M1, and the mini desktop wasn't going to buy you any more capability.

I'm a developer and my M1 Max MBP screams thru the work. Still, if the Ultra granted a significant performance boost I'd buy it too. But Xcodebenchmark says it doesn't so I probably won't.

The point, however, is that good tools cost money, and if you're a professional then most of these things pay for themselves over a very short period of time.