What do you think is better? The web is indeed questionable, but it is literally the best we have, it is still reasonably simple to deploy a web app.

Desktop app development gets increasingly hostile and OSes introduce more and more TCC modals, you pretty much need a certificate to codesign an app if you sideload (and app stores have a lot of hassle involved), mobile clients had it bad for a while (and just announced that Android will require a dev certificate for sideloading as well).

edit: also another comment is correct, the reason it is like that is because it has the most eyes on it. In the past it was on desktop apps, which made them worse