As far as not wanting to mark up on a laptop, nor do I. Which is why I referred to a 2-in-1 type laptop that effectively turns it into a tablet.You ask "why are people so adverse to having options?" and the answer is that options cost money and require engineering compromises. Some options require shifts in engineering direction, sub-optimizing other things. And always adding cost. Designers cannot do everything at once.
That is not to say that your wishes are not appropriate, because they are for some users. Personally I do not want to mark up on a laptop display unless it was to convert to full tablet mode (e.g. Wacom), which would be a major shift in engineering direction, sub-optimizing other things.
As of today IMO Apple is better pursuing concurrent iPad/iPhone usage for markup. My personal wish is for iPhone Pros to support Pencil markup and to operate real-time concurrent with Macs.
Naturally, any change incurs costs from R&D to tooling and even marketing. But with every product cycle, it's inevitable that Apple will have to spend money to move the needle, and innovate to compete. And frankly, adding touch to a laptop isn't ground breaking stuff in 2025.