More people, more awareness about how money works, and more dependence on global investors.
Everyone invests so they can have more in the future, so yes, it's not crazy to imagine people will invest in a company that's growing without knowing any other details.
Why did it grow so large is the question. Why do some of these companies attract all the talent and grow so large and dominate the future is the question.
It's because we're all limited on time and greedy.