External oiling question

I'm not trying to argue the point. I want proof. Up to this point, all I've seen is "I know for a fact" and baseless statements like that. You know? How? I am asking a question here too. Is my question somehow less valued since I'm askin it? All I want to know is at what point is something like this necessary and why? If you can answer it, great. If not, then don't give me a bunch of baseless opinion.

My opinion is based on seeing people run low 8s and high 7s in rail type dragsters with stock style oiling systems with only the 1/2" hemi pickup mod. If memory serves me correctly, I don't think the 7 second engine has been apart since it was built......over 6 seasons ago. It gives zero problems. Never loses oil pressure. I would think if something "needed" an external oiling system and a swinging pickup, a dragster would be it. All I'm asking is to help me understand.