You misinterpreted the second post entirely -
@denel is referring to a hobby. However, to my earlier point - how many years do you have in the field?
Dr. Samar started off as a particle engineer, moved towards centrifuge design and the nuclear tests before working on the Shaheen series and so on.
I was part of this project.
Then moved into designing something similar to below which had me study anatomy and how interpret ECGs.
Then moved into SCADA for refineries so had to learn that with my certifications changing accoridngly.
Now I am a Program manager and have ten projects under me including HW/FW and pure SaaS Solutions.
So if I say that I at one point gained expertise in software defined radio encryption protocols and optimization for embedded systems, link22 for 3 months - all firmware, then ECG data compression -, then PLC design and BLE protocols catered to oil&gas which was both HW&FW, then worked on spectrometers, flue gas detectors and now spend more time holding strategy meetings, defining project plans and directing BA’s in IoT - am I sham for all that history ?
On the other hand, one of our programmers has nothing except design APIs for the last 15 years and is a SME for it. If I ask him about radars or what is a TOC analyzer he has no idea but based on the metrics you seem to outline he isn’t a sham.