I understand HVAC, plumbing, and electrician just fine.
These are not high concept jobs. They are “follow the print” types of jobs. The design of these projects, the materials and methods are specified in the engineering drawings for the specific job element. They need to know enough to know that the materials provided meet the specification and how to read the drawing to complete the task.
It’s OK, you can go on with that thought nicely tucked in your head. I was correct in my inital assesment.
That’s only for new build out. How about troubleshooting involving electronics , gas venting, etc. There’s much more to the job than just following the prints.
These are not high concept jobs. They are “follow the print” types of jobs.
That's not really true. I spent some time as an electrician, and held a license. Blindly following the print in new construction is guaranteed to result in major conflicts. All these trades make adjustments and "adlib" during the course of construction so that things fit together the way they should. I've seen prints that run ducts right through water mains, and run electrical cable tray right through ducts. And those are just the easy ones to adjust. Mis-drawn power substation relay schemes are also typical, and require all kinds of field-engineering from lowly electricians. I've worn out many a red and green pencil correcting engineering drawings.
My experience includes a great deal of troubleshooting as well, which requires a gread deal more analytical capacity than "following the print". I've also done plenty of residential work on additions, garages, basements, and such where there was no print. And, if you've ever rewired or replumbed an older house, you will be basically be working from a mental blueprint, utilizing some creative solutions to numerous obstacles. I'm sure that installing or upgrading HVAC in an existing structure requires quite a bit of thinking things through "on the fly".
Please don't discount the tradespeople. While they have their "grunts", there are many, many intelligent, thinking people that fill those shoes. And that's a good thing.