That's a regulation, which is part of regulatory capture, which only exists due to... wait for it... the restrictive licensing.

Do away with the restrictive entry licensing and that restriction becomes superfluous.  Sorry you needed me to spell that out.

Now, feel free to explain with whatever "complexity" you require exactly how having cameras in cars for the safety of driver and passenger (which apparently you believe can only occur with regulations based on restrictive licensing) can and will not occur based on the exact same -reasoning- that led to the city reg being created.

If it is driver safety, drivers will put them in themselves, or not (which is solely the business of them and perhaps their insurer). If passenger safety, passengers will demand them, or not, based on their own assessment of risk.

Since, in a market with very low barriers to entry, all sorts of options will become and remain available, all involved will be able to meet their own needs. QED