The fact that information is available somewhere is very different from making it available easily to the consumer right when they need it.

What possible argument is there against that?

Do you really think most consumers didn’t care? Or do you think most consumers don’t even know? Cause I’m willing to bet it’s number two.

The argument is it's a waste of time, energy, and money that could be used elsewhere. If the creators of this law really thought this would change behavior, they would put a "review" into the law in 5 years with clear success metrics. But they don't, because this law, like many others, is all about signaling, and not results.

And no, most consumers do not care. Do you know how many people buy used tires because they can't afford new ones?

Sure, the information is more readily available. But what do you think the overlap is of people who care about very, very, very small improvements to tire efficiency and those who can't spend 10 seconds to look up the information themselves?