I've seen many many people say that, and many of them truly believe it, but often their families do not look equal to me. It's still the women that usually do more of the nights, the cooking, the child rearing, but still sees it is equal, because he does more than in some families.
With my accidentally bf baby, we desperately tried to keep a balance of equal (but different) parenting, but the difference in how our daughter sees us is light and day compared to the equality we have with our ff child. He was (is) fully involved in every other aspect. With a mixture of SPL, Covid and other things, he's been round in her life full time for at least half of it. He is very much the 'other parent'. I'm the one she cries for, goes to when injured, sleeps with at night.
It's wonderful when it works out totally equal despite breastfeeding, but it's a lot harder I think. We tried and failed