Because regulators never stop. After a problem is solved, they continue to make life worse for millions of people, or they just plain victimize innocent people. A government could clear up 99% of a problem (fantasy scenario, I know), but the regulators will still try to clear up the last 1%, no matter the cost. People of that ilk are nothing more than Utopians.
The Greek root for the word utopia: “no place”