Are you sure you'd rather have the government police speech?
Google/Facebook/Apple may have an audience that isn't accessible without them, but AWS isn't an internet backbone - there are many peers who do the exact same thing, and they do little more than you can accomplish with your own servers for a higher price.
Just the opposite, I want them to ensure that utilities such as Google and Amazon aren't preventing free speech. My phone service provider cannot ban me for things I say on the phone, and neither should Google, Facebook, and Amazon. Right now the 1st amendment is essentially worthless as private companies control nearly all forms of communication.
AWS is an internet backbone, when it goes down you can see site outages across the internet. Even sites not hosted on AWS have apps, databases, or other services hosted on AWS. For Amazon to arbitrarily ban websites to prevent freedom of speech, with no warning or time to move over to a new platform, I believe this should be regulated. These site also write code specifically for AWS, and can cost millions in development to rewrite, never mind millions in lost revenue.