I cannot tell you if this is a good idea or not. I am not an expert at anything. I've only been using Grapheneos since January, and I've only been using smartphones for about a year and a half. What I can tell you is that I do something like what you describe. I have two profiles, owner and "navigator." My owner profile has my essentials that I use often, and my navigator profile I just use for experimenting with Magic Earth and HERE. I felt I've been driving for decades without any GPS just fine, so I rarely would need to use it. Being on another profile is not a problem since I would rarely need to use it and would be safer in terms of privacy concerns. I was using the Rethink DNS firewall in this profile too, so I could log the internet traffic and see where it was connecting to.
As life would have it. I ran into some construction today and I needed to take a different route. I've taken the alternate route before, but today I had a senior moment and couldn't find it. I got a chance to use my navigator profile!
I know. This is not much help other than to say I do something similar.