You mean you haven't been reading the questions that are constantly being asked on the forum?? The questions that in all honesty you would expect from a 1st year trainee. That should be telling you, that in the most part, they are not suitably equipped to do their job...
Some of the questions posted on this forum are ridiculously stupid questions...that is evident.
However, on a forum such as this...you are only ever going to get to see the questions from guys that need the help and advice...that is the whole point of a Q&A forum !
and you are not getting any idea of how many don't need advice, and have a good and sufficient knowledge of the subject area...
I am sure there are also many proficient DIs that do not ask such ridiculous and basic questions... and if you knew exactly how many DIs are out there working already and that do not ask questions ...then you could make a better informed judgement.
i.e. there are 5000 DIs working in the UK...and we have received 250 stupid questions...therefore there are 95% that haven't asked a silly question !
Consider this scenario of a car mechanic working for Renault for example...this mechanic only sees the broken down and problematic Renaults...the common faults...the 30 gearbox problems a quarter year...the broken cambelts...the braking problems...
...And when asked by his friend whether Renaults are any good...he is somewhat biased against Renault cars...purely for this reason of only ever seeing the bad examples at work...and not the millions of cars that have been driving the roads problem free for years ! No-one brings a healthy car into a workshop for repair !
(ok so Renault might not be the best example Lol
)
My whole point above being, that you seem to have a somewhat biased opinion based on a small 'sample of posts' that have asked some ridiculous questions in the past...
How can you tell these guys are not DIYers...or 1st year full time 2330 students...or likewise ?? Do they have DI or Electrical Trainee written on their signature ??
Personally, I am currently retraining from an electronics background...and have spent 15 yrs working in mobile phones design...and possibly in the past I may have had a hand in the chipset design of your own mobile phones ... that being said I would not expect you to be able to retrain and design a mobile phone within a couple of months of training ! but I could teach some of the fundamentals to someone with good general engineering knowledge...