For years people in federal information technology have been talking about “silos” of information. One of the benefits of moving to the cloud was the possibility of removing some of this isolation. There may be other silos that may not be comprised of hard drives.  For example, when you limit your technical staff to a specific profile. That just encourages sameness of thought.

The Proceedings of the National Academy of Science reported that a more diverse group is more likely to outperform a more homogenous team.   https://www.packard.org/insights/perspectives/why-diversity-in-stem-matters/

We are in a world of attacks coming from every quarter. Limiting yourself to one predetermined category of technical expert will set you up for failure. Think of it this way . . . if a football team has forty quarterbacks, they will lose every game; the same is true if they have all kickers.