I always want the best for my patients, sometimes that means referring to a specialist who just does the one service.
I'd like to say I know it all, I can do it all, but with all the information available today, there just is no way one person who can know it all.
IMO, it's similar to having your knee replaced. Would you prefer go to a surgeon who does one or two knee replacements a week or month, or a surgeon who does one or two knee replacements per day?
Who has most experience and can best treat you if a 'situation' developes?