There is a big difference between the information you make public and information that you want to keep private. If you are using Twitter to express opinions publicly only, then there is little point in caring about how they deal with data you chose to make public to the entire world.
Direct messaging and protected tweets are a different story though, but your statement is objectively wrong.
I'm pretty sure that twitter also tracks what you read even if you don't publish anything. I also remember there was no way to hide the list of people you follow?
Direct messaging and protected tweets are a different story though, but your statement is objectively wrong.