I ran some cable with previous employers but it was in buildings nobody really worried about. If it was to be done in a new building or one with some aesthetic appeal, pros were used.

As an independent, I just don't. I agree with your points entirely. Some clients think I should but I established that policy before I started the business. I'm not good at it and I'm not going to start drilling in clients walls when I don't half know what I'm doing.