In The Flash, s3e8 named Invasion!, it was shown at the end of the episode that the Dominators abducted the Team Arrow with the purpose of
gathering information from their minds about metahumans, using hallucination as a distraction, to help them complete a special "weapon". 1
It was later concluded by Team Arrow in the following conversation:
Wait. Maybe they didn't choose us at random.
Maybe they chose us because we couldn't fight back
Because none of you are metahumans.
Mick Rory is also not a meta; he has a vivid rough past which could be a competent source for the hallucination.
Still he was not abducted by the Dominators.
Why was it so? Did they assume he had no enough information on metahumans? I don't think this is a valid reason for we all know Rory is well versed with metas.
Was it because he was along with Supergirl? But that doesn't make a justifiable argument either as Oliver was also with Barry.
So, why did the Dominators not abduct the non-metahuman Rory?