"The sing song voice, the little rituals around telling them he loves them, the physical affection, the constant verbal input, the creative planning of activities, the thought put into the lunch box, the listening, the coming down to their level, the discipline, the hair plaiting, the endless loads of washing, the sitting with them while they do their homework, the reading with voices....you get the idea"
I do. I'm a bit envious TBH. My DH didn't really do those things, they were still down to me. Although, my mum wasn't a very hands on parent either. I got a lot of that think from my Dad (when he got home from work, DM was SAHP). Which, if you think of it is very good evidence for being good at parenting having more to do with your personality than your sex. I have also self-diagnosed DH with ADHD and possible ASD (I know, I know, shoot me now - but I bet you'd agree if you met him), so I give him a certain amount of leeway on the basis that he struggles to relate to people in general, not just his son.
On balance, I think there is a lot to be said for being cared for by your mother in the first year, where possible and after that, whoever is best placed/suited to the job.
A large part of the problem is the low societal value placed on caring roles. They should be respected and properly supported, whoever does them.