Privacy has been beaten to a bloody pulp, but the fight doesn't need to be called yet. Don't give up, keep telling everyone you can. I know things are looking low right now, but every person you reach matters.
In the case of Zoom, an approach that could actually work is having every step of the solution already completed if you've got an employer trying to push Zoom on employees. Make sure you can clearly state here's the problem, here's why it's dangerous for the company, here's a great alternative, here's why it's safest for the company, and here's how you install it. Reach out to the IT dept if you're not the IT dept to get them on board. If the advice is coming from multiple employees, that will help your case.
I did. He assured me in more professional terms that they don't give a shit. I do a lot of business with them and have been a client in good standing since I became an adult. They apparently have nothing set up to retain customers who leave over this, which would indicate that hasn't been an issue for them. Or they might be banking on me not following through, but that just means they don't know me very well. When it comes time for me to make those changes to my policy, I'm gone.