My partner is an International Pilot, I'm not in the industry and love having time alone...when he is away. Good time for me to catch up with friends.... I guess think of the positives, it makes it easier.
To answer a question though I know quite a few Qantas LH couples, where both work full time (one being a Pilot and the other a FA) and they all have Nannies.
Personally I don't see the point, if I was to ever have children then I would want them to be with me, or their father at least.