It's a privilege that men take for granted, and this Tory MP framing it as a character strength is unbelievable.
Unfortunately women can be more distracted by their kids. And that's not through choice or necessarily through biology - although of course at the very early stages babies are more reliant on their mothers. It's mainly because the expectation is that, at least in Europe, women will take a year off for maternity and then go back to work part time. The childcare (and housework) slowly and insidiously falls down to the mum, until very often women are left in a position that if they're not the ones being "distracted by" (read, looking after??) their kids, no one else will be.
I considered my own relationship to be equal and modern, and it was, but to be honest since having a couple of kids I see my husband's career carrying merrily on (although he'd say he's under pressure to provide) and mine stalling as I take on more of the childcare responsibilities. It's not right or fair, but it's a product of our society.
Am I more distracted by my children? I don't think so, but I do see that by me taking on more of the domestic responsibilities, my husband is free to NOT be distracted by the children.