I watched one on a guy in Suffolk converting an old water tower into a house, he clearly knew what he was doing, and it was interesting to see how he got around the problems. I did not like working on tower cranes so idea of living above the trees is not my idea of a nice house, but I am sure some would find it great, personally I would want a lift, and no glass floors, but that's me.
So yes there are programs about building which don't show silly people. Be it a eco neutral house or a house with some other special feature they give us ideas which we can adapt.
But be it a non British electrician or some one who has done a 12 week wonder course, showing his errors especially when not really an error, has no value either informative or entertainment.
I suppose it started with candid camera, watching the lady filling up a mini with 50 gallons and looking for leak, or trying to put oil in a non existent engine I did find funny when I was 16 years old. Not sure I would today, but the deception did not go on for long, and they had to agree to it being shown, and would be there at the showing giving comments.
But then it went silly, clearly with some shows it was all put on, there were actors which knew jolly well it was all staged, the container auctions is a good example. I had some one who run a container storage unit tell me how he had been approached, he said how he didn't have any abandoned containers, answer was it's OK we will bring in the stock to be auctioned.
I wonder if DIY SOS is the same? do they get a house and put loads of faults in it to be found, are those guys real electricians or just actors? It would likely upset any court case if the faults were shown on TV. So likely everyone we see in the program are actors.