That's the same as me betting on a nfl game
TOTALLY not the same.
If you place a 10 bet, or two 5 bets, on an nfl game, the result will be the same.
If you roll dice at 10, or roll dice twice at 5, the result is much different.
Higher house edge on big rolls compensates variance, variance is bad for investors, so investors want to be paid more.
Easy.