Until private companies decide to remove some individual from payment processing services, and private cloud providers stopped hosting their content and so on.
When nearly everything is private, so is censorship.
We also break up monopolies, so no one company can control the fate of their consumers, partners, contractors, etc.
I’m sure you’ve seen the signs at local shops saying they reserve the right to refuse service to anyone. It’s an inconvenience if you get kicked out but you don’t have a right to the provider of your choosing in the US unless you were denied solely based on your status in a “protected class” (race, gender, over 65, etc.).
It’s the free market at work and if it’s not working other solutions will pop up if there’s enough demand.
Parler? Yeah they had a single hosting provider (AWS) and were in two app stores (Apple & Android). I believe the app could still be installed directly on phones through downloading, just not through the app stores.
So yeah, they (and their users) were inconvenienced, but they agreed to the terms and conditions of these providers.
It's kind of like if you have a restaurant and you violate the terms of your lease (or your lease has no guarantee of future occupancy). The landlord can kick you out, and it'll be a huge inconvenience to move.
I think the lesson is that if you want to do something a little edgy, self-host or find an off-shore host with terms and conditions you're comfortable with. Or, if this keep happening enough, new hosting companies will start up that have fewer terms and conditions. But the big providers are going to be the most strict and care the least about your unique situation and your infinitesimal contribution to their bottom line.
When nearly everything is private, so is censorship.