Your examples are unicorns. A huge part of their success is legacy network effects built over time, and oh yeah, luck. There are more opportunities, yes. But

Your examples are unicorns. A huge part of their success is legacy network effects built over time, and oh yeah, luck. There are more opportunities, yes. But the accessibility of those opportunities hasn't increased all that much. It still takes capital, networking, marketing, hard work and some temporary statistical anomalies which work in your favor at a time when you're equipped to make the most of them.