I think they're pointing out that heavily regulated industries are very easy to fall prey to regulatory capture, which benefits incumbents at the expense of users and those trying to enter the industry from outside. Healthcare in the US is nowhere close to a free market, so it seems perfectly reasonable to question the GP if it's asked in good faith (it's not).

> suggesting that less regulation would make healthcare better?

No, but more competition would. If we want to have private healthcare, we have to actually let free markets work. Our current system is the worst of both worlds.