Lord Spandex, to clarify a few things:
1. I was merely responding to a misleading comment from Sonny saying "At the end of the day the regs are clear. See and avoid is the legal method to avoid mid-air collisions." That statement is absolutely wrong when concerning jet aircrafts flying at several hundered miles per hr. and closing in at twice the speed.
2. I am not advocating that looking out is not necessary and shouldn't be done regularly. As a matter of practice, in terminal areas or on oceanic routes with reciprocal traffic (and in most other circumstances where there is crossing traffic), crew have the habit of visually locating traffic passing within +/- a couple of thousand feet of them for situational awareness. However, the primary indicator for traffic is the TCAS on the Nav Display, and it is only after locating an a/c on the TCAS, that the crew then try to visually sight it.