I'm saying that just because mobile device is the majority of devices does not mean that we have to care about them. Rule of the majority is never a good rule.
Depends on who "we" are, from POV of browser vendors and makers of web graphics apps, there's certainly a compromise needed in adding features for niche users that contribute to the combinatorial explosion of tested configurations. Consider that even WebGL 2 currently is struggling to have a viable level of browser support.
WebGL mostly serves people with Intel/mobile GPUs, so will probably WebGPU if it is to survive, even though it aims to do better on the high end GPUs as well.
