It's strange that none of these companies will include a closable cover for the camera. I got one aftermarket. It is very reassuring since no hacking or accidental misclicks on my part can move the cover.

I've seen HP desktops that have a closeable camera cover, and Lenovo does on some ThinkPads [1], so probably others do too. Laptops usually have very little depth available in the screen part though, which is why most laptop cameras are crappy (exceptions include Surface Pro and Surface Book, which have more depth available and so much better cameras than most, but no cover - at least their camera light is not software controlled).

[1] https://www.businessinsider.com/lenovo-thinkshutter-laptops-...

I had a closable cover and someone shut my laptop with enough force that the cover caused the screen to break. Be careful when closing.

I also purchased a cover for mine, although in a pinch, the removable stickers on fruit work well.

I have a sticky piece of post it note more or less permanently affixed over my camera.

My Thinkpad does.