I am a do it yourself guy: I have been in my current house for 34 years. I do ALL my own stuff. Including minor electrical. I have NEVER hired anybody to do ANYTHING on.. or in my house.
The Exception: I had a new roof put on by a contractor. I'm good, but I don't know everything.
A couple of years ago my insurance company descided my Main Electrical Panel coming in to the house was "Suspect"...and requested I have it replaced. I GOOGLED. They were right. I had it replaced by an electrical contractor. There are some things that need to be done by a "Licenced" professional.
THEN: If the house burns down...and people die..you have someone to SUE. If YOU did the work.....YOU CAN'T SUE YOURSELF.
NB