“If any of this is true, why aren't more people talking about it?”

I feel like I see this a lot near conspiracy theory nonsense.

Not saying that this blog post is conspiracy theory nonsense, but that sentence sets off alarms.

That dramatically misses the context within the article; this is being used by the author as reasonable consideration of potential problem with the theory rather than as support for it:

"The main reason I don't like this theory is kind of an efficient-markets reason: there are literally billions of men who are concerned about hair loss. The most popular preventative treatment for hair loss carries the risk of nasty side effects, like depression or erectile disfunction. If we could prevent hair loss and even regrow hair by breaking the causal chain "upstream" of hormones, why isn't this totally common knowledge? Why aren't anti-hair-loss subreddits like /r/tressless constantly advocating for botox injections as a supplement or replacement for hormonal treatments?"

Ah, you’re right, thanks. My BS filter would appear to need some calibration.