XH, although severely annoying in many ways, was excellent with this. He insisted that he be 'on duty' every other night for the first few months so that I could sleep properly and allow my body to recover. Not only that but he would take the baby, in his Moses basket, downstairs so that I could sleep totally undisturbed.
He worked (works, still) minimum 10 hour days, plus travel , high earner in an important role which required concentration, and managed fine.
BUT- he is the kind of person who can do well on broken sleep, would wake up the instant ds2 woke and crucially, would fall back to sleep the minute ds2 did. Unlike me, who would take hours to fall asleep after, so would average 4 hours a night.
On the days following 'my' night, although I was in charge of the baby/housework etc, if I was tired, I rested. When ds2 napped, I napped. And XH never batted an eyelid if he came home and there was no dinner cooked, or the house was a mess, or I was a snotty, snivelling wreck.
I do think a lot of people cite their job as a reason to cop out of night duties, and I do think a lot of people pander to that, too. But there should be some balance- a woman's body needs time to reset after birth, and sleep is an important part of that. If a partner REALLY can't manage to do any night duties during their working week, then they should do both weekend nights, at least for the first few months.