I don’t agree that the younger have zero agency. Their youth is worth quite a bit. They can leave, find somone else, start over. Youth targets age almost as much as age targets youth. One side usually has more wealth, social standing and the other has more vitality. Both parties often find it is to their own personal benefit. To get rid of all the power imbalances that could happen in relationships, we’d have to have everyone date their equal in intelligence, wealth, social standing, occupation, looks or someone would always have the possibility to have the upper hand. Maybe what’s needed is giving children (under 18s) the knowledge to be able to push back against wrong situations. I used to feel it was age that was the predator but I know quite a few people in recent years, male and female, who have been targeted for relationships with younger people simply because they are perceived to have more financial means.