It shouldn’t be mind boggling. They see revolutionary technology that has potential to change the world and is changing the world already. Making a gamble like that is worth it because losing is trivial compared to the upside of success.
You are where you are and not where they are because your mind is boggled by winning strategies that are designed to arrive at success through losing and dancing around the risk of losing.
Obviously mark is where he is also because of luck. But he’s not an idiot and clearly it’s not all luck.