Troble is , in some cases the so called professional is worse at doing the job than the amateur. Our first house has refurbshed by a proffessional(???) builder who obviously did not know how to fix electric sockets to walls as they came loose very quickly. Then at our second house, we had local electricity company fit new heating, but when they turned up to do job they said we need a new earth point(which should have already been fitted). We pointed out that the son of the previous owner was one of their bosses, and obviously should have known better, and we got the earth put in for free.
I wouldn't want to touch gas, or install electrics, but feel quite capable to change some electric fittings, as long as I use common sence. I wouldn't want to install plumbing, but the humble tap washer does not need an overpaid plummer being called out.
Sounds more like government officials trying to justify the amount of money spent on training(wasted?) up new electriciains and plumbers. As with other unemployment issues they seem to be obsessed with the idea that retraing people will instantly create jobs, when all they are doing is giving people false hopes and putting off the ineffitable.