I am of firm belief that neither the US school system nor the seminary prepares men for speaking. We have very few well-polished speakers today even in the secular world.
That leads to priests who may want to convey spiritual truths but are severely limited in their ability because they were never taught how to be oraters, even if they learned theology from an excellent one.
Without the tools to express a deep theological thought, a priest is at a loss to do so. Remember also, that many Priests feel that they must appeal to the “lowest common denominator” and make a homily that can be understood by teenagers to old grannies. For this reason, they often “dumb things down”.
With that said, I have found that there are a good number of priests, both diocesan and religious, who God has granted with an obvious charism. It is clear that God speaks through them, and it is not the Priest’s word alone that the parish is hearing.