I get chills reading that some founders were eating ramen for a year. Imagine how much extra work could have a fed brain complete.
Some may say I am not understanding the startup life, however without founder's health and sanity startups rarely succeed, because just like you said they're distracted with things they should not be worrying about like living frugally.
On the other hand I would never jeopardize my health, family and property for a startup. Maybe that will cost me 10 million in startup funds from a "get rich die trying" mentality loving VC, but at the end of the day, too many startups have failed because they scaled too soon and because someone made a decision when they lacked glucose. I'd much rather have my physical and mental health and future success, than a short term money to spend and an uncertain life ahead. Now, I am not saying that I would not work extra, but there has to be a balance otherwise you'll burn out.