It's a one-off though.
I'm sure Nordeus are quite deliberate with the calculations and are relying on people to spend more than they normally would in the hope of getting the 'best' outcome.
It's the psychology of gambling really, people kid themselves on that the high figure is the one they will win no matter how much the odds say otherwise.
In this case, the chance of a few 9* players will entice the spend, even though logically you would be better spending the same cash on a safe set of players with a lower level but you can see and pick the ones you actually want.