Blame the Bishop of Lichfield and/or Church Law.
The Chancelllor of a Consistory Court of the Church of England, in which role Stephen Eyre QC was sitting, is appointed by the Bishop of the relevant diocese (which, in this case, is the Diocese of Lichfield). So it's the Right Reverend Michael Ipgrave who appointed Stephen Eyre to the position of Chancellor (= 'Judge' in the court). Thus his appointment has nothing at all to do with the normal appointment of judges to sit in our civil and criminal courts. (Such appointments are made by Judicial Appointments Commission).
When serving as Chancellor of the Consistory Court, it's Stephen Eyre's task to interpret and rule on
Church Law, which can differ widely in its general principles from both English Common Law and English Statute Law. So it's possible that he might have personally thought that the C of E's rules are utter madness but his task was solely to make a decision based upon them and to ignore his own personal feelings in the matter.
As Stephen Eyre sees it, the C of E's rules don't only rule out the Irish language. Byron gets the thumbs down too!
https://www.dailymail.co.uk/news/article-7886787/Widower-heartbroken-Church-blocks-including-classic-Lord-Byron-verse-wifes-tombstone.html