It’s so taboo where I’m from, I cannot imagine how that would arise unless two adult cousins met as adults and did not know they were related before falling for each other. It would be the same as siblings.

There can be love, but it’s platonic, nurturing, and cannot be sexual regardless of whether it is lawful. I’m not trying to lay down a general rule or be judgemental, here. I just cannot conceive of cousins seeing each other as possible love interests.

I imagine the power dynamics refers to the way that, say, an older cousin who has e.g. helped raise a younger cousin might abuse that trust. It seems like grooming to me. Younger cousins might look up to older cousins in the same way as do younger and older siblings. Abusing power dynamics is fucked up, anyway, whatever the genetic relation.