IANAA (I am not an actuary) but surely this can't be the entire computation. Death is only one reason a solo SaaS might fail. The real problem is mental noise, and the fact that large organizations have the positive side-effect of averaging out that noise to produce coherent, predictable actions. (The humanist wants to point out the "noise" is sentiment, artistry, beauty, and the coherent behavior is that of a profit-driven sociopath, but the point stands.)

What I'm saying is that their chance of death is .2% but their chance of discovering Buddha, deciding to give up everything and become a monk, or meeting the woman of their dreams and going to live the simple life in Thailand, and so on, are much, much greater.