It's because this is a bad take. It's the wireless access ... That's a step too far, and it posses a risk to consumer safety, which is why the Biden administration is breaking from its normal support for right to repair bills in this narrow case.

Now, according to Reuters, NHTSA has written to automakers to advise them not to comply with the Massachusetts law. Among its problems are the fact that someone "could utilize such open access to remotely command vehicles to operate dangerously, including attacking multiple vehicles concurrently," and that "open access to vehicle manufacturers’ telematics offerings with the ability to remotely send commands allows for manipulation of systems on a vehicle, including safety-critical functions such as steering, acceleration, or braking."

https://arstechnica.com/cars/2023/06/feds-tell-automakers-not-to-comply-with-mass-right-to-repair-law/