You are hearing the voices of failed investors. There are successful angel investors. There are guys in the NBA finals getting paid $50m a year. There are movie stars.
In extremely competitive pursuits with insanely good outcomes, you are going to find an enormous number of people trying to make it and fail.
I'm not sure your examples make the point you intend. Isn't Hollywood famously rigged, to the point where the term "Hollywood accounting" exists?