What is the philosophy behind DIY (do it yourself)? Why all American "home TV"s (such as HGTV and DIY) and currently most of HGTV Canada's show are based on encouraging and advertising DIY?
Construction is a hard physical work that needs a lots of experience and knowledge. Even we professional, for certain type of jobs hire experts. A professional practical construction job is cooperation of different professional crews under a knowledgeable management. That's how we can make it right and get a quality job.
DIY workmanship is supported by brands, retailers and shops. They want to sell more products. They want shoppers with no enough knowledge, who make mistake and repeat the project on and on. They want "life time buyers"!
As Scottish says: "I am not that rich to buy cheap stuff"! Smart people definitely pay once to avoid paying severally; avoiding headache and living in a whole big mess for months or maybe years.