The common thread throughout is that 'even an ab-initio PPL should have been able to recognize and recover this stall'.
In my flight testing I have had the experience of recovering from a fully developed stall on partial panel when the b$tard sitting next to me has applied full aft trim. Easy, if you know what the aircraft is doing.
It is a different kettle of fish if the the manual tells you, that for no speed info, you apply nose-up and power. At altitude this is going to take you to a stall, then, with (hidden) full aft trim, no stall warning and a TOGA power pitch-up couple you are probably flying an unrecoverable aircraft.
These pilots weren't stupid, there but for the grace ....