I'm not sure that's what they were saying; at least, the second part qualified that first sentence.

It feels like you're changing what they said into something that is obviously false. It isn't so black and white as "do you believe hormones don't affect feelings", so asking that dumbs down the conversation and detracts from the point that testosterone may not be the only thing affecting online conversations.

I guess it's similar to replying to you with the question: "do you believe testosterone is the sole cause for unkind behaviour online?" That just isn't what you meant.