Is there a bit of survivorship bias in this? You hear these stories about how some big company poo-pooed some employee's idea, only for that employee to run off

Is there a bit of survivorship bias in this? You hear these stories about how some big company poo-pooed some employee's idea, only for that employee to run off and turn it into the next big thing, but you never hear about all the ideas that never quite worked out. I not saying big corporate environments don't stifle innovation but maybe there's some sanity in not investing in every "innovative" idea?