Basic255 Multiple userprofiles is to remove the possibility apps can talk to eachothers, and if you set up all the profile info, VPN etc correctly it will also look like a different phone. But this is only relevant for those who have very specific needs, and have actual realistic possibility of being caused harm in one way or the other if they are discovered. For everybody else it's probably fine running close to everything in owner profile. And if you value your privacy maybe move anything related to anything Meta does into a separate user profile.
Having workrelated stuff in one profile and private in another is a valid usecase. In your case you could probably put work stuff in the owner, and for those few times you do any private on the phone just switch to that other profile.
Gotta emphasize that it is highly useful to have very sensitive things in another userprofile, so you can easily purge that profile in case of emergency. But that is not reality for the absolute most ppl. Even if their feelings try tell them that.
I recommend not overdoing it before you get confirmation you actually need overdoing the security, couse every extra step with increased security massively reduces ease of use and efficiency. Maybe in the future we will get better tools to help with ease of use.