I think Bonsoir and I mix in similar circles; my dh just got back from Poland very late Friday after a full on week of meetings going on till late at night through dinner etc, he's home for a week but then in Japan for a week, comes home on the Sat then taking me off on the Sunday morning for a week for our anniversary "somewhere several time zones East of here", that's all I know.
He's always had what Bonsoir describes as an all guns blazing job, when our kids were little he worked till 8pm every night then until 2am worked on his distance learning MBA.
Of course he didn't do any housework, childcare etc for those years, I did the lot because I've been part time as a lawyer for 18 years now, so was always home to do the domestic stuff and when I couldn't manage everything paid for cleaners, nannies, ironing ladies, gardeners etc.
Most of my friends in the village have very similar marriages, where the husband is either in the City so not home till 9 or 10 at night, or doing intercontinental travel most weeks.
The upside is that the men all earn North of £150k so the women can afford to take part time jobs or not work at all, and it seems to work, although I know it sounds a bit Stepford.
If both parents are working 9 to 5 and doing zero work or studying at home in the evenings or weekends, then there should be equal sharing of domestic stuff, but I think that's actually pretty unusual these days, so for the one working their bollocks off, it is only fair that the one working 16 hours a week or whatever does the rest, except when on holiday in which case they should split it