Archive link in case of random paywalling like I got: https://archive.ph/xHMDO
Not necessarily. I went into a bit more detail in my own comment but it might be useful to think that when regulations are written keeping in mind multibillion dollar automobile companies, what the effect of those regulations on a person maintaining their own vehicles might be.
Consider that your Waymo got ticketed, but you had flashed it with a "no customer telemetry" firmware. Once Waymo gets the ticket, they flag your car as having "unauthorized" software and now the ball's in your court that the reason why your Waymo got ticketed has nothing to do with the telemetry feature that tells Waymo what radio stations you were listening to.
Also, when regulations are written keeping in mind multibillion dollar automobile companies, the ticket isn't going to cost $500.
Possible exceptions would be in the case that, after purchase, the manufacturer pushes a software update that meaningfully changes the behavior in such a way that it causes issues. In that case, both A) the manufacturer should be responsible and B) the owner should have the option to get some kind of compensation.