Following on from the mix dilemma and Zoolander threads, I've often wondered why it is that some people seem to be so much better at 'selling' themselves and in so many cases convincing people that they are better than they are. I've seen and heard so many stories over the years, about people who really know nothing, but keep working. It's easy to knock the 'name' guys, but they aren't the only ones.
I was thinking about the engineer I mentioned in the Mixing Dilemma tread. This engineer works a lot and seems to be well regarded. Whenever I speak to this engineer, they are always blaming the equipment for why the recording wasn't great or telling me that the mix sucked, because they had to do two songs a day and you can't do a good mix in less than a day etc. This engineer has also complained to me about how noisy certain desks are. They did an overdub session at my studio once and I noticed that they'd set all the faders in a line and then got a balance by turning down the tape return trims! I realized, that they didn't understand signal to noise and the relationship between gain stages, hence the noisy desks. One of my regular clients has also pointed out that this engineer seems to hate guitars in general, as they are always completely buried in their mixes.
Another guy I've know, was in a band that I used to record very regularly. This guy showed absolutely no technical ability, although he did have some pretty good arrangement and production ideas. One day I had a band inquire about doing a recording and bringing him in to engineer. I told them that they were mistaken, as he wasn't an engineer, but by all means use him as producer. The guy rang me and was absolutely furious that I'd told the band that he wasn't an engineer, saying he'd been doing an audio course and was now engineering. A while after that I was asked by a regular client if I would mind this guy recording the drums on his next demo, to give him some more experience? He arrived quite late for the session, by which stage the drummer had the kit sounding as close to perfect as possible. This guy then tried to hide that he knew nothing, by trying to look busy and saying that if I wanted to set up some mics on the kit, he was cool with that. I of course said, no it's fine, it's your session, I'll stay out of the way.

He set up 421s on the toms, as if they were 'side address' (yes, I did correct him) and got the drummer to set up the overhead mics, by saying (in mock tones) 'you'd better set up your precious overheads, so you can have them the way you like them'. He then spent about 3 hours going back and forwards between the control room and studio 'looking' at everything, but doing nothing. He recorded the drums to 12 tracks of a 16 track machine! This guy too, is making a name for himself as a producer and engineer.
Anyway, I'm aware that self promotion, has always been the thing that I'm worst at, but I was curious to know if anyone had come up with any theories as to why this happens and anyway to combat it, without looking petty.