This doesn't strike me as a good idea at all. You're deliberately inducing an enormous selection bias in your knowledge. Or put another way, if a successful founder says "doing X is a good idea and made a big difference", but there were ten other unsuccessful founders who also tried doing X and had it backfire, isn't the experience of those ten other founders useful information? Taleb discusses this phenomena in "Fooled by Randomness" in the context of the financial industry, and it's a good recipe for bandwagoning and cargo-cult thinking.

Now I agree that I would prefer to only hear advice about startups by people who have tried doing it at all.