And, my point is that calling this research pointless is just wrong because it answers à different question.

I’m not disagreeing that the question that you want answered should be studied. It should. But, the fact that this research doesn’t answer your question doesn’t make it pointless.

It’s perfectly valid research to study whether the results are different between animal-based and plant-based supplements. I didn’t go through the citations but they say:

Recent evidence suggests that both animal and plant proteins support strength and hypertrophy gains when paired with resistance training and adequate protein intake

which sounds like the research you’re asking for has already been done.