The point is not for the match to be exact but the balance to be such that no one has an inordinate amount of power or influence over the other. Which is absolutely a real thing that occurs in many relationships regardless of age but is highly possible with large age gaps.

Age gaps lessen in intensity over time. I am 39, my husband is 52. Had we met earlier in our lives than we did, it would have been pretty questionable. At this point we are similar in maturity, income, career, resources etc that no one has a power imbalance in the relationship. 10 years ago, I’m not sure our relationship would have the same foundation because I’d have been a bit too young and naive about some things, but I don’t know that it would be a deal breaker necessarily.