I started union as an apprentice. Local 774. By the time I had five years in, I was having trouble getting work. This was very early 70's and non-union scabs were taking over. But here's the thing: they were working for a couple bucks less per hour (commercial) and working all year 'round. Union guys were having to travel all over and were working maybe six months out of the year. And how are they doing in Michigan now? (. . . where I'm from.)
After watching a lot of commercial people go under to the tune of big bucks, I decided to keep it smaller. I got jobs wherever I could and eventually went into business as residential.
Perhaps it was a mistake or a necessity for unions to mostly ignore residential plumbers instead of organizing them. I don't know.
But I still support unions and believe in the necessity of them. I'm saddened by the fact that unions have been busted. I'm also saddened that our corporate masters want to destroy the middle class. But there it is.