What exactly are you listening too? There is complete continuity in most songs out there. That is the hallmark of country songwriting. If you can give a few examples to underline what you are talking about. If not, I think you might be confusing formats. That is true in almost all of pop or rock music, but country is not one of those. Or you might have a different view of songwriting. But you are in a pretty small minority if that is your opinion. Of course everyone is entitled to their own opinion.

MAB