If you can provide an example where the production/revenue is on the same level, we might be able to discuss more specifics about your example.
In general though, yes. A position that requires specialized training, certifications, experience and skill should get paid more than a position where none of those things are required. This means less people can do that job, and also means people had to spend a not insignificant amount of money and/or time to get those things.
That's supply and demand, applied to labor rather than goods.