We see what unions do for working class people, but our level of compensation, education, and cultural capital gives us everything that a traditional union gives to blue collar workers. Literacy, internet access, and money go a long way. We don't need a union to tell us what our legal rights are or help pay for a lawyer for us. We don't need a union to tell us what workplace conditions are legal or illegal. We don't need a union to tell us when and how it's safe or unsafe, effective or ineffective to report corporate malfeasance. Again, we have literacy, internet access, and money for legal representation.
Maybe a union could benefit me somehow, but I'm going to need much more concrete examples than just hey, your job is unpleasant sometimes, join a union!