It is an unpleasant topic. It makes us feel bad. It brings on guilt. We do not like to hear about our sins. Maybe we are willing to listen to a discussion of other peoples' sins, but if we hear about our own, it can be hard to listen.
Some pastors avoid the subject.
We need to hear the law, however, for it drives us to ask the question. It drives us, by showing the mess we have. Sure, there are lots of answers as I explained, but there is only one right answer for how we are made right with God. To find the right answer, we better ask God. We better go to His Word, where He reveals the truth.