Anectdotal. But I've only ever heard from people that zoom web did not work. Everyone I've asked told me the same: 'no it did not work, but then I installed it, and it did work'.
Apparently their network effect is so big now, that people use it, despite it not working on first encounter.
I use Zoom on Kubuntu when needed for work, and I always use the web version as I refuse to install the app. It has worked well with Chromium and Brave. Firefox doesn't work well if at all for video chat.
Funny, had to use Zoom recently because of some clients who insisted on using it, and I had to install software (OS X), it didn't work in the browser or I didn't find the switch.
As seen in [0], it just changes the URL. This can be done with the Redirector [1] addon, which is generic and can help with similar problems for other webpages (Twitter -> Nitter; Youtube -> Invidious; www.reddit.com -> old.reddit.com). I wish there was a way to make and see user-made rules.
Apparently their network effect is so big now, that people use it, despite it not working on first encounter.