I think you're confused. I'll explain why.
Some contries enforce regulations on what tyres are deemed road-legal, due to requirements on safety and minimum grip. It's also why it's illegal to drive around with bald tyres.
However, said countries also allow the sale of tyres for track and competitive use, as long as they are clearly sold as not road-legal and for competitive use only.
So, no. You can buy track tyres. You just can't expect to drive with them when you're dropping off your kids at school and not get a fine.
Also, it should be noted that some motorsport competition ban or restrict the use of slick tyres.
Yes, this is a good thing. Where it becomes bad is when someone says "Oh, we should stop that from happening, let's ban the sell of such tires." With no exception.
This isn't a problem unique to regulations and laws. In software development, it is very common for the user to not think about exceptions. The rare the exception, the more likely it is missed in the requirements. It is the same fundamental problem of not thinking about all the exception cases, just in different contexts. You also see this commonly in children learning math. They'll learn and blindly apply a rule, not remembering the exceptions they were told they need to handle (can't divide by zero being a very common one).
Also, just like how calculators are allowed in the exam halls, why not allow AI usage in exams? In real-life job you are not going to avoid use of calculator or AI. So why test people in a different context? I think the tests should focus on the skills in using calculator and AI.
Dig deeper into this. When are calculators allowed, and when are they not? If it is kids learning to do basic operations, do we really allow them to use calculators? I doubt it, and I suspect that places that do end up with students who struggle with more advanced math because they off loaded the thinking already.
On the other hand, giving a calculus student a 4 function calculator is pretty standard, because the type of math they can do isn't what is being tested, and having a student be able to plug 12 into x^3 - 4x^2 + 12 very quickly instead of having to work it out doesn't impact their learning. On the other hand, more advanced calculator are often not allowed when they trivialize the content.
LLMs are much more powerful than a calculator, so finding where in education it doesn't trivialize the learning process is pretty difficult. Maybe at grad level or research, but anything grade school it is as bad as letting a kid learning their times tables use a calculator.
Now, if we could create custom LLMs that are targeted at certain learning levels? That would be pretty nice. A lot more work. Imagine a Chemistry LLM that can answer questions, but know the homework well enough to avoid solving problems for students. Instead, it can tell them what chapter of their textbook to go read, or it can help them when they are having a deep dive beyond the level of material and give them answers to the sorts of problems they aren't expected to solve. The difficulty is that current LLMs aren't this selective and are instead too helpful, immediately answering all problems (even the ones they can't).