Yes, I can perfectly see it from your perpective and I thanks all for information.
I mentioned before that I take precautions and I assume the risk. No one is invited to repeat what I'm doing.
Now, what if I will say, my tests are performed on a special stand on a lab and not in a real home? What if the tested RDC will not be used anymore after tests (even if they are still doing their job) ? It will calm down the spirits, I think.
All are saying - it will burn, it will be knackered, you will be electrocuted etc, but no one is trying to calculate how many time is needed to heat a 30m 14awg wire until it starts smocking. I know there is many variables in the formula. My calculations based on what I have in the lab shows that melting a 14awg wire will take several seconds, but the RCD triggers within 40ms.
The thermal camera is showing that there is no temperature rise in the tested wires. The RCD is disconnecting so fast that there is no time to rise from 20C to copper incandescence temperature. The manufacturers designed their devices to protect the circuit in such situations. If the manufacturers will think like you and use only safe tests, then in real life their device will kill somebody because in real life there is imprevisible situations, non safe situations. That's why is important to think about it. Nobody knows when your RCD will be faulty. If you doubt about your RCD - you just buy a new one and remplace it, right ?