The gambler in me must correct you. The house edge in roulette is only 5.26%, not 8%.
This is irrelevant to your point, however.
This is irrelevant to your point, however.
To put this in more practical terms, consider a roulette wheel in Las Vegas. An equal number of red and black, plus a 0 and 00. That puts the advantage in the houses favor by around 8%. That might not seem like much, but over time, the house will always win out over the player because of it. Remove the 00 from the wheel, and the odds just got a bit better for you over time.