Many people have attended training days in feedback skills but still shy away from giving feedback. This is because to give effective feedback, you need to change your mindset. When you start to view feedback as a gift that helps you grow your practice, then you will naturally invite feedback from others and give feedback to others.
Giving feedback and holding difficult conversations can take confidence and courage. What can help here is knowing how to set up the right dynamic when delivering a difficult message, so that the other person need not feel judged.