To be clear, I think it's really in the nomination process that my district is competitive. My guess is that apart from the few MOCs that don't send a full slate of nominees, I don't really think that it's easier or harder to be offered an appointment from different districts.
Having said that, in the course of this process we talked to as many people as we could, and they all said this district has a ton of highly competitive candidates (before redistricting we were in CA37, which is supposed to be relatively easy to get nominated from). Some of those candidates are worried that if my son got in, they are less likely to. I don't think that's the case, so if someone can say, yeah he was probably charged to a national pool slot and not the MOC's, it might be encouraging to them. If that's not too confusing.