This is correct to be honest. rooting your phone doesn't ruin other peoples phone experience unless you perform actually illegal conduct perhaps (maybe some hacks or w/e?). Cheating in a game is not illegal, so companies need to take it upon themselves to prevent it. This is honestly fairly logical. it does not at all compare to PC or Phones.
And when people "root their phone" they are just modifying part of the device. The baseband is closed source and illegal/impossible to modify in order to protect the network and spectrum.
Some of us do get pretty close and modify stuff like EFS to enable/disable functions (voNR) and enable bands that were present but not legal at the time the device was certified. In US, band 77 was disabled on many devices but later became legal to use. The manufacturers didn't want to pay for the recertification but the device is capable otherwise. We also sometimes add band combinations (for carrier aggregation) that the manufacturer missed.
