where (one) is coming from

One's motivation or reason for doing something or holding some position or opinion. The phrase indicates that one understands the circumstances that led one to an action or opinion. Look, I understand where you're coming from—and I kind of agree with you—but rules are rules, and I can't let you do that. If Gina would explain her situation a little better, I think they'd see where she's coming from.

where someone is coming from

someone's meaning, motivation, or personality. informal