I think the warning here is to avoid the cult of personality prevalent in consumer audio that is almost completely absent in professional audio. My customers never ask "who" designed a particular speaker. They do ask for particular engineers when it comes to system implementation, integration and tuning, but design? Never.
I don't know why, but I wasted time looking at Thorsten's posts, and some of Amir's replies. I never came across anything on XLR connectors, just one comment about power cables. I did come across Thorsten's strong opinions against ABX while at the same time, I think, putting forth superiority of the ITU methodology. We do extensive formal listening tests so it is something near and dear to my heart. I agree with Thorsten in principle on many areas of testing, differ in some, but also disagree with his fundamental premises on ABX (including that it is discredited, which is not true).
The overall impression I get from both of them is that they are not used to, and certainly do not like being challenged by people who are able to do it effectively and calmly. To me, they both try to browbeat their detractors as a way to avoid addressing the arguments made against their positions. I doubt I would enjoy a spirited discussion with either of them. I am reminded of one of my favorite comedy sketches by George Carlin. I will just say obviously neither of them is stupid, and I don't think either of them is nuts, so that leaves one option.