On high-functioning teams with half-way decent product management I've never once experienced a need for consistent, unrelenting "overworking".
My advice to anyone who finds themselves in a situation of constant overworking is to step back, realize that this is only happening because one or more people are in way over their head (could be anyone from ICs up to Execs), and try to figure out who it is. If it's you (even if you're CEO or CTO), then you'd do literally everybody (including yourself) a huge favor by finding a way to extricate yourself from the situation and figure out a more suitable set of responsibilities that you can execute on in a timely and predictable manner.
It's not easy to be that introspective and honest with oneself and one's peers about the team dynamic, but if that kind of meta-analysis can be adopted and exercised, then you'll end up enjoying your work a whole lot more.