They are numerous examples that point to the fact that having tears during prayer is a goal and also certainly a praiseworthy thing.
But why is that? Are all aspects of davening worthy of tears- meaning is it something to ‘cry’ about, for example the first ברכה of the עמידה. (Will crying in such an instance enhance the ברכה etc.?) Surely when we are beseeching God to heal the sick for example that can trigger an emotional response - but that is not the question.
if the question is unclear to you, type some questions in the comments and I’d love to clarify