@hipsterelectron I understand. but look, I think the thing described (the failure to predict risks of rejection) actually should count as part of RSD, since it's defined as sensitivity to being rejected even if it's just imagined (as is what is happening when we cannot predict that it won't happen)
and furthermore, I think this is related to the brain's reward system and dopa levels. when our brains are trying to predict the outcomes of our plans for social actions (even simple ones like saying hello) the "win" condition is detected by the dopa-driven reward system. but in many ADHDers (majority) this fails
when I got medicated, this whole problem (which was huge, a situational mutism that had cost me so so much) went away in just an hour. one small pill and it was gone