I think you are missing out on people that just want one device. When the iPad Pro and Mac M1 are practically running identical hardware, the only difference is form factors and software.
MacOS beats iPadOS easily if we are talking about ‘advanced’ use cases. iPad easily beats Mac on form factors as it has the flexibility to be anything - tablet, magic keyboard, Bluetooth keyboard/mouse with screen.
My annoyance is the fact that these two devices are pretty much going to be running the same hardware, but because of operating systems, I either have to pick both devices or choose between flexible form factor or a more open OS. In this day and age, I don’t want to choose, theres no technical reason to. As far as I see it, I’ll continue to avoid purchasing either until Apple changes one of the devices, or comes out with a completely new line.
To a certain point I get what you mean but even before, when Mac computers were running on Intel chips and iPads running with Ax chips with comparable performance, I guess that the same issue was always available. I mean, before, I do not think that people wanted to buy iPad Pro or Mac because it is more performant than the other one, but instead, software and the use case has been the reason for the given choice.
I can see why you could expect iPad to run Mac OS or similar software since they offer very similar chips and performance. But afterall, I don’t think that Apple is to blame there as for them, it is two different lines of product. One of them is a full computer/laptop with a full system whereas the other one is a Tablet with certain pro cabalities. Even tho today they are offering Magic Keyboard and may be some computer replacement advertisements (I do not know if Apple officially advertised it as such, but I am saying it in case) , but at the end, iPad is a tablet, a companion for their full fledge computers or only device for whose needs can be adressed with such device. It is the similar case in Android area. Whereas on Windows area, there are 2 in 1 laptops such as Surface..etc but on those cases, tablet experience is too compromised. I had a Surface Book, it was a wonderful device and sometimes I was using it in Tablet Mode, but I should admit that the tablet experience was nowhere near the experience of an iPad.
So i think that, apart than the wish to keep the two lines seperate with the software, also the usability may be compromised with Mac OS in iPads, turnings them more into laptops rather than tablets. They could give it a dual boot capability, but then that would canabilise the sales of Macbook Air. So till then, I guess that we are stuck into two devices, until more pro apps can come to iPad Pro that may adress all the needs of more users to go iPad Pro only. Tho, I doubt that it is what Apple wants, as they would like to sell their Macs as well.