When you think about it, it makes sense. People frequently bring their computer into private spaces. Where any given person draws that line will vary, depending upon their expectations of privacy. (One of the criticism I've heard of the recent shift to online schooling is the use of video conferencing, because some kids don't want to effectively invite all of their classmates into their home. This is hardly what I would consider a paranoid demographic and is a situation where you have a considerable amount of control over what people see and when.) Is it really that strange to suppose that some people will want to cover up their camera?

"YeAh but wHaT if tHerEs a sNipEr alReaDy PoiNted aT yOu??".

Makes most sense to secure the camera that you already know exists and is looking right after you. Then you can spend energy on other things.

If someone had access briefly to your laptop at a coffee shop, could they cover the LED with black opaque cellophane?

This sort of attack is pretty specific, so you figure it’s only done by people who want something from you in particular. These sorts of physical prep steps are what I’d be looking at if someone were relying on the light. Hypothetically, I’d attack the light first then take advantage of the false assurance.

Missing or open cover is a little harder to miss.