This is exactly right. When my employer started requiring apps on my phone, they started paying that phone bill and I got a another one.

Completely aside from denying observability to shitbag panty-sniffers like Google HR, it is important to me to be able to wipe that phone when I leave to know there is no remaining access/sensitive info/etc. while also not wiping anything important to me.

Same reason I keep personal stuff off my work laptop and vice/versa.