"After all, with millions of potential entrepreneurs across the globe and trillions in funding chasing them, the chance that an obviously profitable business model hasn't already been dreamed up and implemented by an entrepreneur is basically nil."
This basically amounts to "everything that can be invented has been invented". You sure?
Yes. And it's true, statistically. Most inventable things will be invented by someone else before you succeed at it. Statistically, no one wins the lottery, even though someone always does.
This basically amounts to "everything that can be invented has been invented". You sure?