Unions seem to be great for generally interchangeable workers. Where there's room for personal achievement (or non-achievement), I cannot imagine any good use f

Unions seem to be great for generally interchangeable workers. Where there's room for personal achievement (or non-achievement), I cannot imagine any good use for them. E.g. I'd like to do more work and be paid more and rewarded more, with none of the union pay grades BS. I'd like people to be fired based on incompetence, not seniority. The only situations when I can imagine my outlook changing is if I become incompetent at my job, or lazy and useless (e.g. I've coasted at a job that I disliked for 6 months or so once, and then left; I imagine for some people it might be cool to coast for 6 years instead under union protections)