Twitter is a private company so they can censor anyone they want. If you don’t like it, you’re free to use another service (or start your own). That’s the free market. And if Twitter is as irrelevant as you claim, then it probably won’t be around much longer anyway.
Also, check out John Smith’s post from below that describes what’s really going (spoiler alert: it’s a policy change. Not as exciting as a vast globalist conspiracy, but you know…)