As someone who has gone through YC, I think a lot of the kind of absolute talk you are pointing out has to do with consistent messaging and providing general ad

As someone who has gone through YC, I think a lot of the kind of absolute talk you are pointing out has to do with consistent messaging and providing general advice to an entire group of people who might not have the experience to understand for themselves what the best way to proceed is. Obviously in reality, things are a lot more nuanced than 'always', but when your goal is to help as many companies at once, where the degree of experience varies, it often help to simplify the problem. In one-on-one situations, the partners can give you more personalized insights and in general are quite insightful.