Except that it’s seemingly impossible to prevent against prompt injection. The cat is out the bag. Much like a lot of other legislation (eg cookie law, being responsible for user generated content when you have millions of it posted per day) it’s entirely impractical albeit well-meaning.
I don't think the cookie law is that impractical? It's easy to comply with by just not storing non-essential user information. It would have been completely nondisruptive if platforms agreed to respect users' defaults via browser settings, and then converged on a common config interface.
It was made impractical by ad platforms and others who decided to use dark patterns, FUD and malicious compliance to deceive users into agreeing to be tracked.