Webcam privacy - Should you hide behind tape?

I was recently researching webcam options for some video conferencing and was sad to see that a built-in privacy cover doesn't appear to exist in any new cameras. I used to have a Logitech C600 which had it built-in.

Logitech C600 with built-in privacy cover

It was a simple camera that had my favorite privacy feature. While searching Newegg and Amazon I found that about 3/4 of all webcams are made by Logitech, and while scrolling through pages and pages of new cameras, none had this feature. It's easy to assume this is some high level NSA conspiracy to allow for easier spying... but without evidence to support that it's just some tinfoil hat thinking.

I was recently at an AppSec conference and given a webcam privacy cover that I thought was really cool. Once I had it I started noticing everyone with something similar, or just a piece of tape covering their cameras. Mark Zuckerberg and James Comey even cover their cameras.

Admittedly Zuck and Comey likely have more serious targets on their back and thus their paranoia is probably justified. But my question is this: If a hacker already has enough access to your computer to spy on you, shouldn't your camera be the least of your concerns? I'd be more concerned about my passwords being keylogged, or a man-in-the-middle attack that exposes all of my traffic that's normally encrypted in transit.

Sliding privacy cover

Back to the tinfoil hat thinking, if you Google for webcam covers you'll find lots of companies offering cheap solutions to give people peace of mind. If I were a popular webcam manufacturer like Logitech, wouldn't I take notice that this is a feature that customers want, and build devices like the C600 with it built-in? They could use it as a marketing technique to sell to the privacy concerned masses. I recently Tweeted to Logitech and asked them to share my feedback with their product development team. I don't think I'll single handedly change their minds, but it does make you wonder why they're ignoring such an in-demand feature that they used to offer.