
You're making the assumption that their position as Nuhn means that they get exclusive access and/or dominance over as many Miqo'te women as they want. All the lore says is that they gain the right to breed, and that there's about 50 or so females to every breeding male.
That doesn't mean they run around acquiring as many females as they can manage for a supposed harem type situation. This automatic negative light some of us are casting on Seeker culture comes from our own cultural norms regarding sexuality. This is roleplay though, on a totally different, fantastical and importantly fictional world. It's alright to apply a more neutral sociological perspective to them because of it.
That doesn't mean they run around acquiring as many females as they can manage for a supposed harem type situation. This automatic negative light some of us are casting on Seeker culture comes from our own cultural norms regarding sexuality. This is roleplay though, on a totally different, fantastical and importantly fictional world. It's alright to apply a more neutral sociological perspective to them because of it.