First off, I think that whatever works for any particular couple is absolutely fine.
But for me, as a mother of kids who are way past toddler stage, and as someone who now works full time, I would say the roles of stay at home parent of a baby and full time work are absolutely incomparable.
Unless your full time role is a nurse, doctor, night shifts or wholly manual, taking care of a baby on minimal sleep - especially if you're getting out and about and managing to do ANY tiny bits of housework whatsoever- taking care of a baby is so so so so much harder. On the mind and body.
I'd be wary of being a relationship with anyone who didn't appreciate this and take over the reigns as soon as they got in from work until they set off for work in the morning.
My husband went to work and did a load of the night feeds too. And I can tell you right now that I'd much rather have been in his position.
Having a baby is amazing, but really hard graft.
Loads of women have opinions about what constitutes laziness and unreasonableness when it comes to parenting, but I can't believe 20 year olds are getting into relationships with men for the first time in 2017 and doing the bulk of the domestic chores just because they were born with a vagina.
I'm sure loads of people "feel sorry" for the husband who "has" to go to work and then get up a couple of times at night for the kid he helped create.
Personally, I feel sorry for the people who aren't getting their needs met because of outdated judgements about what constitutes parenting roles.
Like ANYTHING with parenting. If you love your kids and love yourself, do what works for you. All the best.