"In IMC, the chance of hitting somebody else is utterly miniscule. It's away from Russian Roulette by many orders of magnitude."
Russian roulette maybe, but they are different odds to roulette as quoted!
Some airspace where I used to fly IMC is a "corridor" between Gatwick and London zones, and a vertically challenged one at that. The odds are high, granted, but it doesn't give you a warm fuzzy feeling hearing about other traffic in the "corridor" when in IMC, especially if there is no altitude info and they are not on a radar service.