If you are referring to John 7:22 (”Now if a boy can be circumcised on the Sabbath so that the law of Moses may not be broken ...”) how would you square that with Galatians 5:6 (”For in Christ Jesus neither circumcision nor uncircumcision has any value. The only thing that counts is faith expressing itself through love.”)? Or is it another passage from which you infer a conclusion about Christ’s circumcision?
These are the kinds of things that are discussed in sermons at both Catholic and Protestant churches.
Is your point that there shouldn’t be any sermons at all; people should only pick up Bibles in bookstores and read them and that’s it? Or that there’s something unique about this particular Catholic sermon that misses a particular point in a way that a Protestant preacher would not?
Not in any church I've ever been in.
I can't ever recall hearing a sermon about circumcision.