Most safety-stock levels in your ERP were set during the last annual planning cycle, by someone who's no longer in the role, using a lead-time number that hasn't been true since the last port disruption. They get rounded up to be safe, and the working capital they cost gets noticed only at year-end.
The planner knows it's wrong. They can name the three SKUs that always run lean and the dozen that sit on the shelf. But there's no time between fire-fighting today's shortages to rebuild the model — and even if there was, the answer would be obsolete by the next supplier review.
Cash sits in pallets you don't need. Other SKUs run thin and trigger expedites you can't justify. The optimization is doable in principle, undone in practice, because the workflow to keep it current doesn't exist.