I consider it an essential aspect that you listen to other opinions and evaluate them for yourself. I do attend seminars where I assume that there is nothing new for me or the speaker has a different training philosophy than I do. So far every opinion has enriched me. Sometimes it is only one sentence in a one-day seminar that makes a new aspect of training clear to me. Or the realization that I never want to work like this strengthens me in my way.
There are many "gurus" who claim to know the right and only true training method.
I am convinced that a good trainer knows many methods and then thinks about which method is best suited for each individual situation.
I don't want to stop where I am, but I want to be enriched by new ideas and develop myself further.