Assuming they had fab capacity to produce a hypothetical Epyc 13912k with 4.5GHz base clock, I think AMD still nailed the revenue sweet spot with their current mix. So maybe they're not strictly leaving money on the table, so much as it is a lack of demand for a high end desktop that doubles as a server.

Intel has to produce that kind of beast because they're currently slightly behind in some areas. AMD might lose money if they followed Intel's playbook right now.