Yes, but if you are appropriately rated then you could be in IMC and then you can't see other traffic anyway, so on that line of reasoning there should be no flight in IMC without positive radar control.
The statistical reality is that you could fly around blindfolded, and so long as you keep out of somebody's airfield circuit, you would die of old age long before hitting something. The see-and-avoid system doesn't actually work; it's a myth that has persisted for decades. Sure, you can spot a lot of planes by looking out of the window, but most planes are on straight trajectories (particularly at night e.g. not a lot of aeros or gliders) so a target on a genuine collision course will always be a totally stationary spot, regardless of its colour.
Time to duck before everybody jumps on me
