+1
Same complain. Just adding to the bulk.
I don't even have the msft teams application. When I join a teams meeting is because someone else invited me, and therefore I join right on time and from web.
The camera is evident. It's easy to notice your camera is on. Any other things in the form require to be read, which puts the load on the user.
* In basic usability terms (I am not an expert by any means): it demands a greater cognitive load from the user to have to read the whole form every time they join.
* Entering muted by default but making the mute evident (say a catchy button even though it breaks the design a bit), DEFINITELY requires less from the user. Even if the user doesn't already know she's muted, a catchy button will let them know.
In my specific use case, there's an extra load "I will have to remember" that I need to read the form the next time someone invites me to a teams.com meeting, instead of just joining.