Everyone should unionize, brains or no brains. Building alliances with others you share some common interests with is just a smart move if you want to attchieve something. Unions versus individualism is a false dichotomy.
Discussion
Unions have poor incentives, are political in nature, very corruptible, and do more harm than good to the individual worker by drowning them out. In essence, they are a microcosm of the failings of socialism.