I mean, it's common sense.
If I say... You can spend 100 dollars to have someone make a painting and you have a 70% chance of getting 200 dollars back.
You are more likely to do it then
If I say... you can spend 100 dollars to have someone make a paintingand you have a 70% chance of getting back 170 dollars.
If we lived in an imaginary world where buisnesses, companies and investors ALWAYS were going to make a proft, you might have a point.
We don't live in such a world.