Yeah, management positions are often filled by people who:
A) Want to get a higher paying job and don't care about the product or the industry necessarily (MBA-circlejerk types).
B) Are Devs/Artists/Creatives that wanted increased compensation, and the only way up was as a manager where they have less aptitude.
Executive staff needs to better integrate management as "servant leaders" within teams, and compensate EVERYONE better
Nah @exu is right: non-IT focused companies do not have the skills or desire to reliably set up and maintain these systems. There is no benefit to them creating their own server stack based on a community distro to save a few bucks.
Smaller companies will hire MSPs to get them setup and maintain what they need. And medium to large size companies would want an enterprise solution (IE: RHEL) they can reliably integrate into their operations.
This is for a few high value reasons. Taking Red Hat as an example:
When lots of money is on the line companies want as many safety/contingency plans as they can get which is why RedHat makes sense.
The only companies that will roll their own solution are either very small with knowledgeable IT people (smaller startups), or MASSIVE companies that will create very custom solutions and then train their own IT operations divisions (talking like Apple, Microsoft, Amazon levels).
Not to say what Red Hat did is justified or good, because hampering the FOSS ecosystem is destructive overall, but just putting this into context.