It's best because all other options are worse. Seriously
We use this logic for all sorts of things. When biological or adoptive parents aren't perfect, we don't say "ah, that means there's something better out there to raise kids". We know that for all the failings of parents, the state would do a far worse job. The same is true for virtually all other things. You may overpay for fig newtons, but the market factors that go into that decision are much better than any other hypothesized options.