Curious So when one install GOS those out of the box permissions on network, sensors and location should not be changed?
That is what is recommended indeed, the reasoning why was explained aswell.
Curious I mean I read on many threads that changing them has no extra benefits (except for braking functionalities) etc.
Exactly.
Curious but am I supposed to just trust?
Ultimatly, you have to place trust in some parties.
U are still a free person and can do whatever u want to do. If you want to revoke those permissions, u have the ability, but u are made aware of the consequenses it might/will pose down the line. In that case, please be self aware and respectful and don't ask for help when u encounter said issues.