There's a good reason this attitude bothers me. DIYers are almost SOLELY responsible for the escalating home insurance rates in this country. Water damage is the #1 cause for claims, and by a large margin. When a non-qualified person attempt a a DIY plumbing repair, the rate of failure is multiplied exponentially. When you do something stupid and your little weekend project floods your Brazilian rosewood floors, insurance issues a payout. Know who pays for that? EVERYONE, in the form of increased rates. Want to talk rocket science? This is as simple as it gets. If you'd have just called a pro to begin with, you'd have literally done right by untold numbers of other homeowners.