I agree in which case you should actually check the facts.
I am interested to know how you know what caused the pump to fail when you haven't even looked at it.
The fuel pump was not switched on when it failed, it had been off for several minutes and only ceased "burning" (When something fills the cabin with smoke that to me is a fire) after I had turned off the master switch not the fuel pump switch. And had been on for less than 2 minutes prior to that as per the check list for swapping from one tank to the other.
You quote the procedures for operating the fuel pump, I would like to know where you found them because I have the POH for that aircraft in my hand and there is no mention of the fuel pump in it. Nor is there a circuit for it in the wiring diagram. For me to get the wiring diagram that showed the fuel pump, I had to email the factory direct.
I agree the pump was switched, and there was a blade fuse there which was not wired in accordance with best practice nor the eventual wiring diagram.
The incident did not happen as you say during a long low fuel flow descent. So if you decide you want to bag the pilot before you do an investigation and find the "FACTS" you should first at least take the time to gather some evidence. Because I have plenty. Being a qualified Electronics Technician put me in good stead when I fault found the aircraft, and I find it interesting how quickly the factory determined to remove the fuel pump and evidence prior to a thorough investigation. But not quick enough to prevent me doing my own.
I have been sitting back waiting for the factories response and from what you have written here there will not be one. So if you would like the facts by all means ring me some time to discuss them.