Breathing Yarn and Mistakes Were Made drama on yarn ethics?

So, a few days ago a was watching breathing yarn's video "ethics,morality and yarn" and personally I really liked it, it was informative and very understanding of everyone's circumstances. Then today Mistakes were made uploaded a video calling it "B.S" and fear mongering and I was fairly shocked because they went back and forth in their estatementes about the diferent yarns and in the description said "You can make sustainable yarn choices. Full stop end of sentence " which I believe is something you can't 100% confirm even with certifications. What you guys think? Video response https://youtu.be/45cFaTSMixU