This is really true. The business risk may be very real, but the personal risk for many is relatively limited. For some people, going without a steady income is to truly be without a safety net and risk having to sleep in a shelter. For me, when I started my company, I went in knowing that if we ran out of money, I could get a nice dev job within a few weeks and not only bounce back, but bounce forward (or at least sideways). If things went really sour, I might even have to move back to my hometown for a couple months. Gasp!
In this world, agency is a privilege that's hard to measure. I feel like sometimes people underrate their own and mythologize their self-madeness, but overrate that of others and pathologize them as lazy or cowardly.