The thing about these numbers (or any numbers someone might come up with) is that they are wildly culturally and chronologically specific, with no consistent way to modify them for other cultures, times, or anything. I can totally imagine Aslan passing a morale check others might fail. Or Vargr, for different reasons.
Historically, in the 19th century and before, most of the TNs in the system described above would be very low, but even lowering the pass to a 3+ means 1 in 36 runs away, which is not how movies portray these things (which is all I know about them). The Charge of the Light Brigade could almost certainly not have happened under those rules. The Western Front in WW1 and the D-Day landings in WW2 could probably never have happened, and a lot of historical things that happened could likewise not have happened due to even 1 in 36 people running away.
I am OK with morale rules for NPCs, which these seem to be representing, but I don't feel like these specific rules would do a very good job of portraying specific groups.