Having family who worked with the UAW as well is IBEW I can tell you that Trade Unions in general are much better at 'holding a standard' and truly keeping their trade-craft respectable.
However the UAW, the most worthless crap joke of a union that makes other unions look bad. Basically just protects people who show up to work drunk or drive forklifts into walls. Forces companies to do insane things to fire people who do nothing but drag down the common output of a factory.
Be careful what you wish for and who you choose to put in control a good union can be a blessing... a bad union can be a millstone around your neck that ends up just being owned and, in the case of the UAW, is just a puppet for whatever company they serve.
I will say that when with Amazon I talked to some of my peers in Germany and I was fascinated with the labor protections that were provided to staff over there vs. the USA. They have some kind of thing, like a "labor council" or something. This group had to be consulted before lots of things could be done. In this case I think that it kept the Amazon buildings across the pond much happier than the ones in the USA. (Obviously this is simply my opinion)
I am on the fence, I was raised in a blue collar union family- even went to a little UAW brainwashing camp as a kid (Black Lake anyone?). My family members in IBEW have shown me that there are some very dedicated unions that do very good things and keep a trade from turning into a free market shitshow where everything becomes lowest bidder. If a union exists to truly protect staff AS WELL AS uphold high standards I think it will survive. When its just US V. Them...gimme` free crap, you are asking to be burned to the ground by competition.