It's different because Facebook isn't selling coffee, they're selling a "community platform" and publicly insist they support free speech. Warren is demonstrating not "this is a terrible coffee, contrary to the company's claims" but "this is a terrible platform for freedom of speech, contrary to the company's claims".

IF you believe representative democracy, though perhaps fatally flawed, is the best system of government we as humans can muster THEN demonstrating the forum for debate is flawed is more essential than roads and water.