You are a trip! Instead of rationalizing what you think I was "trying to say," you should try to comprehend what I actually wrote. Maybe if you reread all of my posts you'd get a clearer idea. Nowhere did I write that physicists designed model engines
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Again you said that physicists designed the componets that manufacures buy such as the metal, tools, etc. If so and they are used then physicists are taking part in the design, even if they don't know it. However physicists haven't worked in this area in a century or more. Physicists only deal with the most new research.
Just as an aside there are plenty of physicists who aren't on the leading edge of research, folks with a BS who took their undergraduate degree into the real world to make a living. They aren't all brilliant PH.Ds. I've known a few.
I suppose when I'm working on my car I am not a non professional mechanic, but an engineer repairing my car? I suppose there are physicists delivering pizza, but unless they are removing black holes from the pepperoni they are not working as physicists. Those that cannot make the grade are teaching at college, and if not up to that then they are not working as physicists.