"Hope this helps!" immediately negates any goodwill your conversation actually provoked.
Maybe it wasn't always this way, but social media arguments and the chronically online have thoroughly bastardized the presumed good nature of this comment. It could be the most engaging, thought-provoking, genuinely helpful email / comment / analysis / step-by-step guide that's ever assisted anybody in the history of ever, but if it ends with "hope this helps" it abruptly changes the tone to one of condescension and sarcastic criticism.
Unless you are in a face-to-face scenario where you can supplement with a smile and proper inflection, for your own interests you should probably avoid using this phrase, especially in a professional setting, lest it sparks a passive-aggressive battle of painfully fake cooperation and appreciation.
Unless, of course, that's your goal.
For everyone else though, hope this helps 😊