Actually no, tenants have a right to a livable space. This includes but is not limited to running water, electricity, heating, and functional appliances. Say for example that there's a bug problem in a building. There's a legal process so tenants can place rent in escrow and get relocated at the cost of the landlord until the problem is solved. A tenant union assists with that process. Tenant unions often also negotiate the price of rent, to keep it affordable. To me, this sentiment is the same as "you'll be fired for union organizing". The chance is there, but fearmongering doesn't help.