Nope, you certainly don't. But to be a Baptist you must believe Baptist doctrine, not Catholic doctrine. Doesn't that make sense to you?
If I were working for IBM, why would I embrace MAC Operating System and demand a MAC computer.
There are Baptist distinctives and then there is Baptist doctrine. As we well know, all Baptists do not believe the same doctrines. There are Freewill Baptist, Full Gospel Baptists. etc. Surely you aren't going to tell me that all Baptist are in sync doctrinally. Remember Kingdom Exclusion?
I've seen too many Baptist churches split over doctrine to know that y'all don't agree on doctrine.