Wow. I can't imagine contracting work from people (and giving them access to commercial-in-confidence data) and yet not knowing with 100% certainty 100% of the time that the people I'm talking to are the people I'm contracting with, you know, the ones I background-checked, the ones I can hold accountable in court.
You know what happened with remote schooling? Teachers didn't demand that pupils turned on their cameras because of the same 'it'll make them uncomfortable' excuse. Result? Kids turned their computers on, their cameras off and played minecraft all day for 18 months.
Don't be odd about this. Nothing at all about face to face contact is uncomfortable for adults. That shouldn't be something that's normalised and it's detrimental to society to allow for it. You are literally reading an article that outlines all the negatives about your 'cameras are uncomfortable' mindset and you still haven't twigged?
Keep doing it your way, but don't be surprised when you've had your entire company's data exfiltrated and sold to a competitor by the 'person' you were too uncomfortable to ask to appear on video.
And don't for one microsecond retain people who mysteriously only produce quality work when 'unsupervised' or 'overnight' or when they're 'on the phone all the time.' Fire them! You have no idea who they're talking to or who's really doing the work. They're not an asset to your company, they're a bullshit artist!