It's quite hard to learn something completely new by taking 1 or 2 week courses once a year. I had a 55+ year old dentist who wanted to pull out my tooth and r

It's quite hard to learn something completely new by taking 1 or 2 week courses once a year. I had a 55+ year old dentist who wanted to pull out my tooth and replace it with a bridge. The tooth was cracked and 1/3 of the tooth had fallen off. Luckily he worked only half time and was on vacation a lot so difficult to get an appointment so I got to see a young dentist who could fix the tooth by repairing it (building up the missing part). She said it could last a month or forever, but if not lasting then the next option would be a titanium implanted tooth. Making a bridge would have been considered malpractice nowadays she said. The old dentist was probably a master at putting in bridges, but if that method is bad and he never practiced the other technique, which you probably cannot learn in a 1 week yearly course, then tough luck. Not the perfect example maybe, but imagine you have learnt assembler and C in school and programmed in that for 30 years doing say embedded applications. You maybe update yourself regularly in that very field of assembler and C. Then one day you are asked to program a web app using HTML, javascript and CSS and complete it in the same time and with the same quality result as someone who has learnt it in university and with a few years work experience. Quite hard.