Often human sexuality is rooted in power dynamics and these things are associations. I certainly am attracted to powerful women wearing whatever style of clothing my primary school teacher had...
Power is one of many aspects of human sexuality, but it's also part of much broader human social dynamics, and I have not seen evidence that power dynamics are unusually predominant in sexual vs non-sexual relationships.
I wouldn't say it's predominant. It just influences it, and for some people it's all about that and much less about anything like appearance or the sex itself.