“I know exactly how you feel.”
How many times have your heard that line, or a line like it, when you were expressing some personal sorrow or woe to another?
And was there ever a doubt in your mind that when the person said it to you, they were wrong?
They had never been you. They had not faced your situation. If they meant well, they were imagining themselves in your place, maybe; more likely, they were transferring some experience of their own and placing it upon you, pushing your real experiences aside in favor of remembering their own. They were feeling empathetic with themselves, not with you.
And in some cases, they were not meaning well at all.