Without worrying about malware, several times I've clicked on some Skype like program while trying to make a voice call only to find it trying to transmit ugly video of me.
Valid point. I have to admit I'm a bit "video call vain" as well. I like to make sure my hair doesn't look too crazy and my room doesn't look too messy before getting on zoom/skype/etc. But one thing the last few months has taught me is that many of my friends/colleagues/family really don't care about these things!
Yeah, I'm not even worried about malware, I'm more worried about joining a call with video on by mistake using a legit program.
I mean, the thing is that I never want to use video on calls, basically. Waste of bandwidth and no worry about broadcasting the wrong thing by mistake.