If I may, I'd like to re-phrase and offer an opinion.Fair enough. Leads me to ask the question as to what is better: to alow a practitioner to consider Yidams as archtypes and to practice according to that interpretation or is it better to remain locked into a formal (correct) interpretation which may cause the prctitioner (due to their karmic preponderances) to abandon practices and lose faith in the teachings?
In cruder terms: Is stuffing orthodoxy down someone's throat and turning them off entirely to practice better that letting them do what they find comfortable?
Short answer:Of course not!
Longer answer: We all start where we start. I advocate keeping an open mind about the things that are uncomfortable for us. Having a closed mind by defensively rejecting them is an impediment. The unacceptable threshold comes when, in order to make ourselves comfortable, we change the teachings to suit ourselves as opposed to just putting it on the back burner.
In terms of Vajrasattva and NgonDro, faith is a result of practice. If there is some faith at the start of practice, then that is like priming the pump. If there is no faith but just an open mind it takes longer to show results (i.e. the pump has to prime itself). Having a closed/dismissive mind makes things even harder to show results, if not impossible.
But of course these broad generalizations are not absolute rules. Individual karma trumps generalizations...and just my opinion anyway.