Work/life balance issues are something I care a lot about it (in fact, I wrote a book about it: https://codewithoutrules.com/saneworkweek/).

So I've walked away from jobs where it was clear I wouldn't have work/life balance.

E.g. one company told me: "We don't want to, but we're working 50/60 hour weeks. We had everything planned out and then a big customer had a big feature request and it blew through our schedules."

Good planning involves setting goals, but also making sure you have time and resources available to deal with unexpected problems, because there will be unexpected problems. To lose one weekend to an emergency may be regarded as a misfortune; to lose all of them looks like carelessness. And I didn't want to be working long hours because of what was clearly bad planning.

(Sometimes you can catch warning signs in advance: https://codewithoutrules.com/2016/10/14/job-you-dont-hate/)