I use docker, too, and it's absolutely trivial to add the .repo file for the official docker repo to /etc/yum.repos.d/. "Yanked away" is pretty strong and unwarranted, IMO.
You can pay docker for business licences to get commercial support. At the level where you think about getting it, I honestly can't feel bad about the extra cost to the company.
Adding repos from third parties is not always allowed due to political/security considerations. Besides when paying for Redhat based on it being better/more "stable" then them breaking all your stuff by removing it is absolutely an issue.
