Well, do you have any hard data to support your opinion? The fact is you have the same than I do, none. If you take look at DJI forums, every two or three days a new thread pops up about a mid flight power shut down and those are the ones that get reported in forums, they are probably many more unreported, out of warranty, etc. Also we have the related problem of charred battery connections which also shows up here and in DJI forums quite often. I believe that
P4P battery problems are quite widespread and it is behind DJI stock issues and discontinuation of the
P4P line but I don't have data to support my opinions. If I made a SORA based study to certify a certain operation to my country regulator, I can not tell why my
P4P batteries could fail, how many or which batch is failing and what is DJI doing to fix it. Therefore, the regulator won't allow me to operate in demanding enviroments. That's the difference between my drone and the ones talked about by the OP.
For the serius aviation industry, "extremely rare" is an useless concept. If a drone used by a company doing deliveries in an urban area does a mid flight power shut down, it does not matter that the ocurrence could be "extremely rare", they will have to prepare a ton of papers publicly explaining why it failed, how many or which ones are affected by the design error and what they will do to fix it, if they want to keep flying.