I'm not aware of any harm he caused; the $600 medicine thing could have harmed the uninsured I suppose, but being uninsured already means you'll get fucked by any medical bills anyways. So the fucked stay fucked, and he didn't change much to that equation. Afaik no, or few, new fucked people exist by that action.

The event should have brought attention to the absurd dependence on insurance Americans have to have, and the fact that it gets worse by a positive feedback loop (as insurance companies extend their "benefit" range, the relevant market increases their price to make use it, so more people need to get insurance to see "proper" pricing, which means insurance now has enough power/money to further increase their "benefits"). Afaik he just participated in the feedback loop, but made no effort to affect it (nor should he; its a macro-level government-scale problem)