If 90% of startups fail, 25% success is 2.5x above average. I'll listen to someone who's advice improves my odds. I'll also listen to someone who's tried and failed and admits it honestly and takes responsibility for their failure and knows how to avoid the same mistake next time. Someone who hasn't failed probably hasn't tried. Someone who hasn't failed may have nothing of value to teach me. If you do have or know of better methodologies though, please share, I'd love to get more pointers!