A requirement for camera always-on just show that the corporation don't trust you. I would never even consider working there.
I have a decent cam mounted above my monitor, good lightning, and an interesting background behind me, designed for online meetings. When I turn the cam on, people who see me for the first time will not be distracted by dirty laundry or a messed up living room, or some greenish or bluish reflection from the walls (or some Elon Muskish red head floating in a dark void). I will look OK (or at least not worse than I do in real life), and the scenery will be better than average. This makes it OK for me to turn on the camera in the first place.
For 1x1 meetings and meetings with just a few people, I find camera on to be effective. Body-language is important to understand the participants perspective of the conversation.
For meetings with many people, I usually keep my cam off, or on only when I speak. For example; in online town-halls and other long meetings with 20+ people, I don't feel a need to communicate trough my body-language how inaccurate some statements sound, or how boring some presenters feel. It also give me an opportunity to keep the sound on, while doing something useful.