This is an absolutely wrong comparison. Building startups is R&D, it is not the production, so acceptability of failure is much higher. Better compare it this way: what if 99% of all potential new drugs fail clinical trials and never make it to the pharmacy shelves, of which 9% would be deliberate scams devised by con artists to extract funding? That will be just fine, and in fact, that's what it is in the drug world! We are still, as humanity, making great progress in treating diseases.
