Like fear, you should take Survivorship bias into account, but it should not dominate you. If you do you will do nothing in life. When I created my first company my parents told me about how hard it was going to be, how few succeed... On the contrary I found it was way easier and natural than studying engineering was, for example, and hundreds or thousands of people could do it. I found most serious people succeed in…
I have met several very smart people who have done great things but have not been fortunate enough to succeed financially because (for example) some well-funded, well-connected silicon valley competitor came out of nowhere and took all the market share through the sheer force of advertising. Many things can go wrong.