When I'm working, most of the time I'm on my desktop, with a ~5 year old web cam attached to a monitor. For a while, I wondered if software was just making "me" look good (quality, not my face, ha!) but I had someone do a screen shot. And my $50 web cam is 5x better than basically every Macbook web cam for video chat. And my desktop is a ~2 year old 8-core, 32GB machine. Not a
monster but excellent power plus 27" and 32" monitors, and an ergonomic chair, keyboard and mouse. The webcam mic works well, too, even in conjunction with my external speakers.
I can game on a laptop (with a decent laptop stand and flat surface for a mouse) but I certainly wouldn't want to do 8 hours of work on it. (Or a laptop on a table/desk, which isn't the right height or a good keyboard setup either...)
Long-winded way of saying I agree with you. But I did buy all of my desktop gear - nothing was work supplied.