If the company can usefully gain access to that expertise by paying a consultant, then why should that be a problem as far as the market is concerned? There's nothing in the idea of efficient markets that says anything about how the company or economic activity should be structured (in fact, there's an argument that having such activity be subject to market pressure could improve market efficiency).
The main issue, of course, is that a truly efficient market is a theoretical construct that can only be approximated. And in practice the approximation is often quite poor: successful companies are usually only doing one or two things right to make their success, then doing most other things in a mediocre fashion, and usually one or two things just short of catastrophically badly.
The main issue, of course, is that a truly efficient market is a theoretical construct that can only be approximated. And in practice the approximation is often quite poor: successful companies are usually only doing one or two things right to make their success, then doing most other things in a mediocre fashion, and usually one or two things just short of catastrophically badly.