Hmm, I would like to work less hours, and sometimes I manage it. Right now, it's bad because of the slowdown in the Chinese economy, which is impacting on our business globally. So everyone is working hard. But there have been some blissful years in my career, including some as a CEO, when it has been fine. Fine for me is no weekend working and maybe no more than 10 weeks a year travelling. And being able to work from home a day or two a week.
But it's also very flexible in some ways - if DD has a play, or a parents day, providing I get more than 4 weeks notice, I can take time to attend without losing holiday. I can sometimes get to her school and take her out for lunch, which she loves. I supervise her piano practise, even if I'm away, help with her homework, I taught her to ice skate recently, play tennis, lots of really fun stuff she enjoys.
Today I'm home already, and am about to go any join her play date (ie catch up with friends!). Not worrying about day to day money is a huge relief - my parents almost lost their house in a financial crisis when I was in my teens, so that tends to shape me chasing financial security.
It really is a hugely specialised role, and there are very few people with my skills set, not just in the UK, but in the world. And continuity of decision making is key - so a job share like you suggest isn't really practical.
I whinge a lot sometimes, and sometimes I want a simpler life, but in reality, what we have works for us. Everyone is happy most of the time, which, ultimately is what we are striving for.