An endodontic apicoectomy may save a tooth root but it seems so barbaric a procedure even in the hands of an experienced endodontist. Care to comment?

Incorrect. Itis a highly specialized microsurgical procedure, done under local anesthesia in an effort to save your failing tooth. If you are that fearful of the procedure you can always be put to sleep.
Endodontist. Endodontic Specialists have been doing apicoectomies as an efficient, well controlled, generally successful means of treating severely infected teeth. Trust your Specialist.