Because you said that a X% house edge means the house has X% more chance of winning than the player. However, that's not quite true in the generic case.
Let's say I want to 10x my money on PrimeDice. I have a 9.9% chance of winning, and the house has a 90.1%. That corresponds to a 1% house edge, even though the house has a +80.2% more win chance.
So it's better to think of house edge as "how much expected profit will the casino make" divided by the size of the player bet.
The house edge in that case is based on a Roll over value of 90.09% not 90.1%.
But in general whenever there is a house edge and you have a low win %, the house edge is more against you since you do more rolls which are against you.