Hard agree.
Just this past weekend, just for fun and for recreational programming purposes, I tinkered with Termux on my Samsung S9 FE tablet until I got a full-fledged XFCE window environment running. It uses Termux:X11, which is a stand-alone APK that functions as an X server client, and the Termux app running an X server. So I can seamlessly use apps installed on the tablet as Android apps (such as Brave browser) with terminal sessions in Termux (essentially the "TTY" layer) and other in a full-fat terminal emulator within XFCE (in my case I really like Alacritty) to do web development (serving stuff to http://localhost:8000) or desktop graphics/game programming that's easily transferrable to my other machines because it's written in a portable scripting language like Lua and Love2D.
I got it all working the way I like over the course of a single weekend of not-particularly-focused or effortful hobby-grade tinkering.
And not a single part of this would even be possible if I was trying to do it on an iPad, despite the iPad having like 10x the compute power of my Android tablet.
Consider that your use case is relevant for an infinitesimally small percentage of Apple's user base. It would be an utter waste of time for them to cater to you, and it's a waste of your money to buy their products.
Why doesn’t Apple allow you to use native screen sharing to control other Macs on the iPad??? it is enraging