I agree with your comment about flustering people with correction.
Just to share an example, I was recently in a job which I hoped to stay in and retire from in fifteen years. My boss thought it necessary to correct me at every conceivable opportunity. If I packed a box to ship ahead to a trade show and enclosed two pads of sticky notes for our booth, she would huff disparagingly at me and remove one as “excessive”. If I made a typo on a rough draft, it was a matter for a performance discussion. If I got in five minutes past what I had casually estimated during a blizzard, it was a discussion. If. I made one legit mistake, she made fun of me for making “a million errors” in front of colleagues
One week, she was really on a roll, looking for correction opportunities. It did rattle me. What she corrected me for were not even mistakes…she might have an alternative idea, a different word, a preferred color…but just as easily, it could be argued that what I had come up with was better than her idea. I was happy to collaborate and implement her requests and suggestions, but her unceasing “correction” of perfectly good work drove me to distraction. Rattled, I started to make actual mistakes, and then her correction became increasingly nasty.
I asked her several times nicely to “please give me a moment to concentrate” which she took as a dare, apparently…she escalated and was so in my hair, I felt like I was being chased by killer bees. It was unrelenting. After she ignored my nice requests for about four days, I finally let her know I was feeling bullied and picked on, it was rattling me, and I was asking her to stop. I was fired for making this request.
I think we need to be careful in correction. Having a different idea is not the same as a better idea. Let others do things their way. Give people autonomy over their work. Let good enough be good enough. If you are a perfectionist, well your perfectionism is your deal…other people may have different priorities.
I would perhaps let a priest know if I couldn’t hear him, or if he missed an infirm person awaiting for him to come to her with communion, or as our cantor did yesterday, let him know there was a consecrated host on the floor by the altar that he had not seen so he could properly attend to it…not as correction but as a fellow Catholic sharing in the church. I would never nitpick his homily, manner of speaking, his singing voice, etc.