There is opportunity cost which is working for a big company from the start. If startups are not risky enough to be irrational to get involved, are you saying

There is opportunity cost which is working for a big company from the start. If startups are not risky enough to be irrational to get involved, are you saying then the big companies are acting irrationally when not getting involved? That's of course a dual view. But it seems to me that the big corporation is more likely the one that calculates the correct expected ROI than the startup in the unknown space..