I just don't love the idea that my dinky little app has to ask every customer every time I add a new feature significant enough (debatable) or different enough (debatable) that uses their data in a way either I or they didn't anticipate (debatable). God forbid I try to monetize it (debatable). 'Control over your data' is meaningless in our current paradigm and I'll rue the day something like GDPR comes to the US in a meaningful way. No wonder the EU can't build.
As for this specific article, Zoom's (rightfully) getting heat for this but I don't blame them or any company for exploring how they can monetize every last morsel of data. In zoom's case (and many enterprise software companies), customers are paying a shit load of money and they didn't sign a contract and consent to give data for training an LLM.