A and C,
neither of my previous wives left me because of any nefarious activity on my part (there was none), but neither could cope with the aviation lifestyle. The bill's the same, whichever way you look at it.
As for retiring to allow a young person to have my job: no way! I'm 45, I have a pension from the RAF and I could, at a push, live without my airline job. But I didn't go through all that training (still ongoing) to give up just when it's all coming together.
The statutory retirement age in this country (UK) is 65. That's likely to rise as the average person's longevity increases and we discover that we can't afford to pay people to sit on their arses for 25 or more years. I intend to have a comfortable retirement, and my children will, I hope, have the opportunity to go to university. I'm not giving up work for you. The fact that you can't get a job in aviation at the moment is not my fault. Wait your turn.