I work in 3-4 different Spaces on my Mac, and when I do Zoom calls I always populate a new 'space' with all the windows that I'm going to need for the call. Doing that and turning on DND has been pretty reliable for me, but then again I'm not presenting to the world, so it's lower stakes.
It seems overkill to you because you don't have a need for it. That's like saying a Ryzen 3900X is over kill because it has 12 cores in it. Overkill for you maybe, but not for those that need the core count.
