Security through obscurity is a fantasy, and a dangerous one. You start thinking your screen door matters to the bear sauntering by, smelling what you're cooking, and coming in for a snack.
And to be honest, most business stuff is by unencrypted e-mail, so I don't see how a TLS encrypted Video Chat increases their exposure.
Finally, the chance of someone, even zoom, recording and analyzing all the video conferences ever to somehow get important info from a video conference seems pretty low anyway. Unless you're worried about the NSA, and even then, it seems like they'd have a way into WebEx etc also, so even on risk.
At this point, it seems reasonable to go by what works for people. And Zoom works.
But privacy is not about those privileged enough to where privacy doesn't matter.
I don't care that you don't care. Privacy matters.