You pay good money to get it done right and stuff gets half-arsed because it would have taken them an extra or hour or two to do it right... now you need to live with it for years because it saved them an hour. I suppose that's why we're all on this site in that we will tend to have this mentality of doing things ourselves or right.
Yes, I got so fed up of paying for poorly done work, that plus the waiting on getting it done and all of the arrangements needed. Quicker, simpler, much cheaper and much less stressful - to do it yourself.