Simply put, yes. Two very successful people have to consciously focus on ensuring that their relationship remains a priority because, at the end of the day/your life, your family is what you will likely care most about.
I think it is also important for those people to outsource household duties when possible (so that their lives aren't just about work, cleaning, and running errands). For instance, have your groceries delivered, have all your laundry picked up, washed, and folded by a laundry care company, utilize companies like blue apron to take the fuss out of meal prep, and etc. In general, as much free time as possible should be devoted to spending QT with the other.
I also agreed with the person who mentioned an at home helper for the kids, preferably a grandparent or other family member. Regardless of your income or work status, it takes a village to raise a child and sometimes a third party is needed to balance schedules/pick ups and etc. We don't have to be super human; it's okay to acknowledge when you need help.