I am developer who spend 2 decades developing things. First decade it was hardware and now I moved to software. I can always guess which idea from “idea person”

I am developer who spend 2 decades developing things. First decade it was hardware and now I moved to software. I can always guess which idea from “idea person” will work and which is not technically feasible. In my limited experience the “idea persons” are not really listening why stuff does not work. Sometimes simple laws of physics are ignored.