Collective bargaining for better wages and working conditions is part of what got us a step up from the world described in Upton Sinclair's The Jungle. It took 30 years, but did you expect it to get fixed quickly and easily? Politics is a lifetime grudge match. The Capitalists you sell your labor to, ideally, want you to work for free with perfect efficiency 24/7/365. That's why they are replacing workers with robots.

Anyway, a professional organization will give you more far flung networking opportunities as well as intelligence on what's going on at other firms, which will increase your value as a worker, and presumably, your pay.