That is true for certain types of work but to the contrary for others. Projects where the risk of doing a poor job is within an acceptable range are those that

That is true for certain types of work but to the contrary for others. Projects where the risk of doing a poor job is within an acceptable range are those that one ought to give DIY a try. For instance, I've replaced bathroom sink plumbing at least 5 times on my own. The worst that has happened was that the connections weren't sufficiently tightened and water leaked until I addressed the issue. Cutting pipes too short would be an inconvenience but still not a big deal.