Here’s the ugly truth about work.
You don’t get ahead on minimum effort and 40 hours per week is minimum effort. That means if you want to be successful, you are going to be still working while other people are going home. Which, if you are GOOD at and you are LUCKY, leads to success, which means continuing to work more than 40 hours per week.
This typically continues until 1 of 2 things happens. Either you’re one of those freaks that loves to work and you do it forever, or you burn out and coast until you get fired or move on to an easier job.
Oh, but what if you want to be “balanced?” You can certainly do that, but you’re not going to get anywhere near the top doing that because you will be competing with people that aren’t “balanced” and they will outwork you.