Pedantic counter-example and Exhibit A: The endless litany of unraveled crypto scams that keep getting bigger and better, year over year. There's one that's going bust right now.

It's the poster child for a perfect market environment, where everyone involved is simply trying to optimize their returns, and there are next to no rules. It's also full of hucksters, thieves, conmen, liars, and flat-out frauds, to the utter detriment of any legitimate commerce in the space.

You don't think the market could sort this out through time? Free market believers don't think the market will sort out every problem overnight - it is pretty much the belief that the bad players get shaken out over time.

The harder ones seem to be healthcare (massive info asymmetry) and anything related to pollution (externalities). The market has had time on those and not done so well.

Even if they did, it would be idealized free markets that did that.

Not the very much non-ideal, largely non-free markets we have, rife as they are with information asymmetry, non-commodity products, buyers with urgent time needs, and a host of other aspects that utterly invalidate the Free Market Will Solve Everything gospel that so many try to preach.

The argument isn't that the free market will solve everything. It's that there isn't a better solution. It's a lower bar.

Well, that's trivially falsifiable.

A competently regulated market is better than a "free" (ie, unregulated) market in nearly all situations.

On what planet does one falsify a claim by simply making the opposite claim?