After 12 years on Macs I picked up a touchscreen PC and would simply never go back to a non-touch machine, it is not essential, but it is incredibly convenient. Why shouldn't it be possible to touch rather than tap when appropriate? After a few months selecting an appropriate option for any particular input is totally natural and subconscious. I have no idea why noting the lack of touch on a Mac should be considered "biased".
Touch is definitely much faster to get through certain styles of forms. The first that came to mind where I'd often tend to touch is the TFL (Transport for London) journey planner.
This is not to suggest replacing a keyboard with a touchscreen, any more than suggest a keyboard is no longer required since a mouse or trackpad is available. It's just an additional form of input, and one I'd personally definitely miss.
I will add this though. You can side car a tablet to your Big Sur Mac. Pretty sure it stays touchable through to the Mac client.