Because there was no need to answer such a silly question. Even the four evangelists did not say the exact same thing. Besides, the mentioning of the 5000 bishops was to refute the attempt to reduce the Catholic (i.e. universal) Church to that of Rome alone.
Silly to one who cannot answer the question.
This again highlights the false claim that only the roman catholic church has the exclusive grip on the truth.
If the Vatican is not producing the script for each service a catholic priest leads then each priest is up to their own understanding of the Word.
We see that from Salvation's postings from Msgr Pope.