To steel-man your point, I agree that legislature that amounts to surface level micromanagement is almost always counter productive. I like your macroeconomic approach to these issues.

Still, I found your counterexamples here dismissive but unconvincing. Loan sharks and kneecappings are precisely the things we need legislature against. Contract law by itself can't prevent desperate people from signing loan-shark contracts. "No good reason to be operating an unsafe workplace" is still enough reason to use children in coal mines until actual labor laws get passed. Anti-slavery laws are pretty plainly laws against powerful individuals enslaving weaker individuals--not sure what you mean with the "laws against laws" card there.