The answer is yes.The question is still valid. Are there many individual churches today, or is there one great big one?
There is only one side of the fence I would choose to be on, and that is what the Bible teaches. There is one church, that meets in many different fellowships. How many different churches do you suppose will be in heaven?You say there are separate churches, then you say there is only one. At least stay on one side of the fence or the other.
This issue like so many others has nothing to do with "rights". We can do a lot of things because it is our right to do so, but that does not make it biblically right. You can only speak of tradition, you cannot justify closed communion Scripturally. If your church chooses to do it, then they have that right, just don't put forth that the Bible teaches such, acknowledge that you are going according to tradition.If a church observes closed communion, that is their right.
Bro Tony