I only have 4 gacha golds + 4 event girls at the moment, so I would still prefer new girls. As a fairly new player, the last thing I want to have are dupes as I feel I wouldn't be getting much value out of them besides one sure equipment slot.

I would start not caring about them if I already had, say, at least half of the 5* gacha girls, and I'm far from that point yet.