Perhaps you have a better explanation for why the Saints have almost never stacked the roster with RBs on either the “power back” edge or the “scatback/receiving back” edge of the spectrum of talents running backs tend to primarily possess.
I don't know what you're trying to ask. Payton definitely favored having his RBs be involved in both the running and passing game. The question becomes were the Saints more effective because sometimes they had a RB that was more of a powerback and one that was more of a receiving back OR were they more effective when they had 2 really good RBs. Ingram/Ivory or Ingram/Kamara...good backs no matter how you frame it. A far cry from Steckler/whomever or Khiry Robinson/Travaris Cadet.
See you're cherry picking memories to fit a narrative. Having a power back and scatback dual didn't make the Saints running game effective, having really good RBs despite their strengths made the Saints running game effective. Saints shouldn't have been trying to fit a mold at RB this past draft. They should've been trying to stack talent at the position.
So when I see that it's pretty widely accepted that the Saints drafted a guy to fit some mythical mold, when real games repeatedly proves this tactic is a fallacy, instead of taking the better player, it really annoys me. Because even though we fans don't know for sure...there's probably some truth to it.