these stories are more common than not too and not exclusive to startups. look at any high level executive at a bank and they’re working 6-9, sacrificing time with their spouse and their kids, to build a career.
i’ve worked with founders who would check slack on their honeymoon, who has their wife begging them not to go in a holiday, and who took a whopping two weeks off (i.e. working from home) to help their wife after their first child was born.
but i also know founders who have found work life balance and have made sure their employees have it too.