The level of anger that the pastor exhibited is not confined to priests, or the Catholic Church. Elders in general do not like to be corrected; those who are professionals (and let’s not get into an arguement about professional or not about priests - I am referring to those who have advanced degrees and are in a position of power and/or authority) have a tendency to look at someone who does not have a degree as not knowing enough to come in out of the rain, let alone tell them how to do something that is within their provence and “expertise”. It is a bit akin to someone with an undergraduate degree in pre-law telling a senior attorney about law. Maybe not the best analogy, but it will do. Just because the pre-law student doesn’t have a law degree and 15 years of practice does not mean that the attorney knows more; but the presumption certainly is there that the attorney knows a bit more.
Some pastors will take the comments kindly; out of that batch, some may change and others may simply ignore the comments. Others will take the comments not so kindly. And too often those who would make the comments are naive enough to think that the comment will of course be well received, since it comes from a Church document.
My original comment appears to have been made long before your time; it comes from a song by Ricky Nelson: “Fools rush in, where angels fear to tread, and so I come to you my love, my heart above my head…”, although he was not the first to use the phrase.
Wisdom comes from experience. Experience comes from mistakes. Mistakes come from lack of wisdom. And some never learn from their mistakes, and are bound to repeat them.