This is bull$hit! I trained pilot knows how to deal with a “runaway trim situation.” You turn off the automatic system, and resort to what most non-commercial pilots do, manually trim the plane. My next door neighbor is a Southwest Captain. SW flles ONLY the 737. He tells me that there are two switches at hand that disable tne motors that drive the stabilizer trim system, and there is a manual crank to speed up the trim process if needed. He told me that only a seriously training deficient pilot would have crashed either of those planes. A/C are not video games, they need to have pilots who know the basics of flying, wherein when the bells and whistles are inoperative you have the abilty to resort to basics.
Your door next door neighbor is full of crap, and completely ignorant. I would not want him flying my plane. Pretty much everything you said he said has long been picked apart as propaganda and untruth. The actual details are much more complicated than that crap.
+1