Look, I am not saying iPad doesn't have any usefulness. The entry level iPad and iPad mini is perfect secondary devices of Mac. I think it the entry level iPad is perfectly fine for kids, elderly or even students.
All you need to know is I support side-loading apps, you know how I feel about iPadOS or iOS. I can put up with restrictions on iOS, because I have Android phone as my primary phone. I can put up with restriction on iPadOS, because I have Mac and Windows as my primary computing devices.
The M4 iPad Pro which is selling well over $1799 Canadian Dollars (which is about $400 over the entry level M4 MacBook Air), if you adding the overpriced keyboard case, it is well over $2100.
M4 iPad Pro is pointless entirely because of the price point and the restrictive iPadOS. It doesn't matter it has best display on the market, the iPad Pro itself isn't really make any sense.
If I have to choose a Mac or iPad as only primary devices, I choose Mac without any hesitations. Honestly, until Apple removes restrictions on iPadOS, iPad Pro is pointless.