It might have some sense if we are talking about desktop environments and mobile platforms, where you have a more or less clear user using it to access websites. And for Windows and Mac that is mostly true, but not always, and for linux is not even half of the picture.

But what about all the rest of things you use operating systems for? Will they stop using cars or any kind of transport that have one or several running operating systems inside? Routers or internet connectivity? Finance, clusters, whatever? Have facebook in all the operating systems on their servers for all the platforms an age verification check for whoever logs in, or not?