You can use "Quick Assist" app on non-Pro to support other's PC, rather than remote desktop. It can connect to PC under NAT. RDP don't support NAT traversal by default so not suitable for support use case. Even WinXP supports "Remote Assistance" (I don't remember how it work). Did you tried RDP to PC in other house past? Please don't expose RDP port in the wild.

For user id claim, it's not only due to MS but all services. MS and others improving situation by supporting FIDO and password manager.