The browser-vs-app debate aside, the bigger issue for me is what happens once you're in the call.

Screen sharing on Zoom (or any platform) is where the real anxiety kicks in. One wrong tab, one notification, one bookmarked URL you forgot about.

I've moved to keeping a completely separate browser profile for calls - nothing in it except the meeting app. Overkill? Maybe. But it eliminates the pre-share panic entirely.