This person never mentions if there is some sort of recent code change, so when I hear this I figure even if its true, its the result of the IBEW and lobbing, not something based on logic. It's not like ballasts have changed in recent years, nor have a I heard of any tragic mistakes made by non electricians.
So I decided to look into it. The 2016 Winter Commercial Electrical Code Update from the Wisconsin DSPS has this Q and A, easy to understand answers to common code questions:
We have an employee who installs electrical wiring in our facility. We are licensed as a RCAC or residential care facility. Does our employee have to be licensed as an electrician? What are her options as far as the type of license needed to per form her work?
Answer: Yes for installation. No for repair. Ss 101.862(4) (b) Employees may perform maintenance or repair. Installation must be done by licensed electricians. ...
Which is what you would expect. Don't be fooled by someone looking to safeguard "their" work.