Because not everyone is a smart and talented overachiever like you. Some of them just want to find themselves in a comfortable situation, with the least amount of work necessary.
When "normal" people bail out on a startup, they go find a regular job because they have to. If there was an option to just live at the other's expense, they'd just go on to do it.
Also, the 21% percent of people who say they would start a company, but don't, are probably more afraid of the possiblity of failure than unable to cope with the consequences.
> A study by McKinsey Global estimated the true figure [of unemployed working-age Swedes] —which included those on sick leave, in early retirement, in jobs programs—to be between 15 and 17 percent. Jan Edling, a researcher with the Social Democratic trade union LO, estimated the total figure of unemployed to be 19.7 percent. (Edling's report was suppressed and he was himself offered "early retirement.") The Confederation of Swedish Enterprise said the figure was 16.5 percent. Other studies ranged from 12 percent to 18 percent.
When "normal" people bail out on a startup, they go find a regular job because they have to. If there was an option to just live at the other's expense, they'd just go on to do it.
Also, the 21% percent of people who say they would start a company, but don't, are probably more afraid of the possiblity of failure than unable to cope with the consequences.