U know that especially pixel phones can be unlocked[0] for alternative roms without google?
Alternatively you can debloat an android with a desktop thanks to adb, when you don't want to unlock and reset your phone for a new rom.
There are already enough open source alternatives to replace Google software from android phones. Even some who replace Google play services for the apps that need it, while only having minimal contact with Google servers.
Especially with your needs it is really easy to go Google free on the phone you already own. In any other place I would think you just don't know better, but here it just sounds like an excuse.