MQL counts are easy to grow and easy to game. Lower the scoring threshold, run a broader webinar, buy a content syndication list, and the number goes up while revenue stays flat.
Pipeline is harder to fake. A demand gen team that reports on qualified pipeline created per quarter has to care about what sales accepts, what converts, and what closes. That changes channel mix decisions. Paid social that produces cheap leads but no opportunities gets cut. A niche industry newsletter that produces five leads a month, three of which become deals, gets doubled.
The transition is uncomfortable for one or two quarters because the numbers get smaller. Make the case with a cohort view: show the last four quarters of MQLs, their opportunity conversion rate, and the pipeline they actually produced. Then propose targets on the output, not the input.