A new car usually has a service/maintenance plan that might be 3 years or so, so it makes sense to only mandate inspections once that does not happen anymore.
Those service plans are not mandatory and they don't need to be very comprehensive, for ICEs it usually revolves around changing the oil and filters, it doesn't include comprehensive checks of the car's functionality.
Yes the service plan is not mandatory, but when your car comes with an 8 year warrantee, then it's best to actually go and have the services performed, as it might pay off in the long term. A car is basically an amalgamation of consumable items. _Everything_ eventually wears out. To not specify some form of maintenance plan or schedule is absolute madness.
On all the cars that I've owned, there was a comprehensive "inspect" section that details things like lights, suspension, brakes, seals, exhaust/muffler etc etc. Many of the "inspect"s will then be things like check the brake pad wear, check the fluid levels,
It's in the manufacturer's best interest to inspect every inch of a new car as part of that service plan, so that they can find and fix any small issues that might become big and expensive issues down the line. Faults on cars compound over time, and something as innocuous as a low coolant level today could result in a grenaded engine down the line if not caught and rectified early enough.
