But it's awfully irresponsible to pretend it's good for society to spread it.

Not everyone has the scientific knowledge necessary to understand p-values and what they mean for research like this. It's a lot to ask that everyone know the standard for publishing in medicine is a p-value < 0.05, which corresponds to a 5% chance of the study's results being wrong. It's a lot to ask that everyone be aware that there were 130 different studies on hydroxychloroquine and to do the math from there to determine that we'd expect 6 or 7 of them to be wrong.

It's much better to say "just because it's not illegal doesn't mean it's a good idea" and just not share such thoroughly bad information.