Ah, so you think Venture Capital should categorically not exist and everyone should bootstrap. I understand where you are coming from.
Here's how to grok VC: first of all, realize that even the VCiest VC understands that VC is a niche, and they'll send you on your way if you walk up to them with a bootstrap opportunity, even if it's a good bootstrap opportunity. This is a site run by VCs as a funnel for the VC scene in a VC town, so you'll hear a lot about VC here -- but bootstrapping definitely has its place. If you listen closely you'll even hear people talk about opportunities being better suited to VC or bootstrapping. Opportunities that can be bootstrapped should be bootstrapped, because then you get to keep more equity.
Here's the critical point though: not all businesses can be bootstrapped. What happens if you try to organically grow your way into a new wide-open opportunity in a winner-take-all market? Some other guy raises a boatload of VC, beats you to it, and shuts you out. VC eats bootstrapper lunch. In theory, the returns from these outsize victories are great enough to offset the failures, but as with any kind of investing it really comes down to educated guesswork.
It's not a ponzi scheme because on occasion it is wildly successful. It systematically reduces the time required for industry to colonize new technological niches. However, it does fall flat on its face from time to time, because that's what happens when you run instead of walk (or perhaps parkour instead of run).