I never said parser alone will help. No one said that. You inferred it. If there's a blm i know struggling with a rotation i can give tips hint they can read a guide. Then what? Test it. Yes. You said "test it" a bunch of times in your post. And ya know what helps with "testing"? Seeing an actual number. Parser. That's all im saying.
Yes. Toxicity is bad. I'm aware. But reporting, blacklist, exist for a reason.
All these guides and number crunchers , theory crafters, learning tools are there from people who used parsers and stuff to help us save time and struggles. Blindly following a guide will only do so much. Having my own number right there for me to see is also an asset i would love to have.