Paul doesn't want to use Zoom unless he can prevent it from accessing his personal information. How can he do that? Leo says that Zoom has a web interface now so that you can log in as a guest for your Zoom calls. And it's got new security features to keep your information safe and secure. Zoom has spent a lot to secure its platform. But understand that the company is based in China, so it's likely that everything that goes through their service is viewable by the PRC.
But if you're concerned, get everyone to use Jitsi. It's open-source.