What about if a man had been completely uninvolved in his daughters unbringing? If you're strangers who just happen to be genetically related do the power dynamic problems still apply?

From what I've heard, consensual incestuous relationships tend to be between people who did not know each other when they were growing up. Humans seem to have an instinct against being sexually attracted to their close social family. I've heard of cases of people who were half siblings marrying and then discovering that they have a shared father.

I still think that if the problem is power dynamics, surely we should have laws against rape, child abuse and domestic abuse rather than against things that may be statistically correlated with them.