This whole event is serendipitous for me because the company I work at and the Union I'm in just had an interesting contract renegotiation process recently.
So many people in my Union, particularly the ones in similar range of years in it, have expressed discontent and disappointment with our Union/new contract. The point we all ended up coming back to, though, is that we'd rather be in a Union than not.
Like with any grouping, there's often disagreement about how to go about business, as well as a fear that representatives don't always operate in your particular best interests. And while things are done in a democratic fashion, there's always concerns of outside influences being corruptive on leadership and influencing decisions. Not to mention the fact that the working week schedule makes it difficult for consistency with regards to engagement with the Union and it's decisions.
One of the reasons I left a previous employer is for the opportunity to be apart of a Union. I was having a discussion just a couple days ago with a co worker about a dispute they were having with company management. It ended up circling back to the point of "you're in a Union. They (management) ain't gonna do shyt to you

". The confidence in knowing you're protected by an apparatus that is willing to fight for you, the worker, has been worth it's weight. The company doesn't particularly care for that arrangement, so you know it's good.