Misogyny isnt built into Islam's DNA. Unfortunately, after studying theology, it's quite obvious that organised religion has evolved to be misogynistic. One of the main focuses of organised religions has, historically, been to control people. In particular women.
I also agree many muslims do eat during Ramadan. Children are expected to do it, though some do.
However, Op, can you not see how hypocritical this is. How he is using and planning on using his religion to control you and children. By converting you are agreeing to being your future children (presuming you want them) in the religion.
What he is currently doing, is not practising because it doesnt suit him. It suits him to live his life. But when he is married it will suit him, to have a wife who does practise the religion and wants his children bringing up in the religion. I would also hazard a guess he will turn a blind eye to male children not adhering to the religion. But not female children.
I am betting you have either not met his parents, or met briefly. He will be coming under pressure to marry a muslim women. This shows, he may not practise but he will adhere to its rules, when it comes to big things and will do as his parents expect.
It's simply, that now, it suits him to be young and free not constrained by his religion.
I was brought up catholic. You see it in the catholic community. I have friends who are Jewish and it happens in their community too.
Ita about control. He will have far more control if he has a wife and kids that adhere to the religion. But he doesnt want to.