C'mon, you've GOT to know that your argument is based on a total misrepresentation of what doctrine is.
There are things you have to believe as Catholics, and things you are permitted to use your judgment on within certain guidelines, and things where you can believe what you want to, so long as it doesn't conflict with some doctrine.
Just because a bishop has an opinion on something doesn't mean it's doctrine that everyone has to believe. To suggest that is pure ignorance on your part.
If you were to name one of these specific items, I'll bet I could find a priest, bishop or pope who contradicted it...