As a dirty commie myself, I would love to agree with you but unions have shot themselves in the foot too many times this way. Unions themselves must take responsibility for their public reputation or they stand to disappear. Attorneys don't have that problem.
>> Who would join a union that won’t support its members?
Me. I had many jobs where joining the union was "manditory". Whether it was the union at the universities where i studied or taught, or the union that runs the film industry in which i worked as a kid, there was no practical alternative. None of the unions of which I was forced to be a member ever represented my best interests.
It's a contradiction. Thinking about it involves holding two conflicting thoughts in your mind at the same time. I can't change that. I'm just saying it's never been as simple as some like to pretend it is.