I’ve worked closely with a number of self-made billionaires over my career. One of which has won 18 Indianapolis 500 mile races. They all have very similar perspectives about work. 7 days/week, 16 or more hours per day. They become even more single focused when there is a big deal going down, sometimes going days without sleep.
They pay a huge personal price for their success. Many are divorced and have tragic personal issues. Family time is nothing more than an entry on their calendars. Work/business is why they live. Family is generally just a distraction for them.
I've worked with many self made millionaires and a few made a billion, and some of the lower earning millionaires had great families and that is probably why I would put them at the low end of millionaires.
How bad is that?
If they were so focused on success then they would sacrifice all else.