So why not 50/50 when young? Well, look up primary attachment theory. The prevailing logic is kids have a primary attachment up until 2-3. So short frequent visits with dad would seem better than one 8 hour block. So when we look at best interest the age of the child is a factor... So as a very rough guide I reckon you should be looking at every Sat arvo from 2 pm until say 9 am and two 3-4 hour mid-week visits.
Look I don't like the whole gender debate. Can't help but think you're right, though. Dang. So high conflict is bad for kids. There are cases where one parent has been pretty much removed from kids' lives because the relationship between parents is so toxic that it was detrimental to the child as the child was caught in the middle.
50/50 shared parenting works when both parents are child focused. So if one parent is gonna act like a twit, the other parent has to work out how to respond. Sometimes we can't help but want to get mad at the stupid behaviour, but a child-focused response would suggest you smile and nod. So if it gets to a magistrate you can at least show that your behaviour is child-focused and then explain that you're confident any conflict will pass once the dust settles because obviously courts cause tension. That tension will disappear once the orders are finalised...