In any organization it generally pays off to have most people have a basic knowledge of a subject and then hire domain experts to drive most of the impact. For security, for example, this typically manifests as having very general "best practices" for most developers to follow and then a small team that handles anything that requires advanced understanding of the area.

How this typically works with performance is very similar, with a small team working to identify problematic areas where optimization would drive the highest impact, and the rest of the organization keeping performance in mind but not otherwise concerned with it in their day-to-day work.