MacBook Pro was originally intended for professional users with professional needs. Those users still exist but I suspect many (if not most) MBPs are bought by people who could easily switch to an iPad Pro and this keyboard with very little disruption to their user experience. I have a 2019 MBP but it MAY be my last one at the rate the iPad Pro is evolving.
You are so wrong on this one. As soon as you want to do something more advanced in anything than the basic stuff, the iPad sucks. Look at University students for example.
1. Excel is **** on iPad, even the most up-to-date one are not on pair with the Mac version and come nowhere close to the windows one.
2. Outlook is much more limited and way more cumbersome to use (Mail is limited and not anywhere near as feature rich) Funnily Gmail is the best you'll get, but still not the desktop mailing experience.
3. No stats or modelling software. Matlab, stata, r, cad etc.
4. 0 support for coding.
5. Photo, video, audo editing is still not on or yet.
6. Gaming, if you want anything more advanced than fortnite.
But we have to give it to the iPad Pro it is after all very good at taking handwritten notes.
There are things were iPad pro overlaps with mbp on basic functionality, there is also a small set of more advanced things you can do if you really want with an ipad, but it's going to be cumbersome.
Maybe you we're talking about the 12" Macbook users.