That's the federal requirement for a NEW car being sold in the US.
As a consumer, there's no law that says you need to MAINTAIN that system. (that I'm aware of)
If your state doesn't have annual inspection, who's going to know if your tire pressure monitors aren't working?
I wouldn't (and don't) worry about it. I know how to inspect a tire and use a tire gauge. Been doing it for the 35+ years that I've been driving.
Now, if your tire pressure light is on when you go to SELL the car, that could be a concern for a potential BUYER. But, for you to just drive the car yourself... pfffth. Drive the car!