Why are phones allowed to have bulges and chins and notches, but laptops somehow are too "thin" to do the same? For that matter, why hasn't anyone made a laptop screen with a centre notch? people accepted that for phones and now every large manufacturer of phones use notches in their phones.
Laptops are much larger and heavier so it's really doable to include a better camera.
The only thing blocking isn't technical.
On laptops you can either create a bump on the backside of the lid, which looks weird as the use of it is not obvious, or you can extend the camera in the front and create a dent in the bottom shell, which also has no clear use and seems out of place. Either way, it will look and feel weird.
On phones it at least highlights the powerful camera and most users are not bothered by it as it extends into the phone case.
When the phone bumps and notches were first introduced it was plenty weird and ugly and obvious with no clear prediction of whether people will be bothered with it or not.
Obviously people are fine with it now.
If the market is a bit open minded with laptops, we can all have better webcams. Form follows function. If I can get a notched laptop with a great 4K laptop webcam, I couldn't care less that it has a weird notch.