Are vestigial organs really evidence for evolution?

Evolution is all about survival of the fittest, the best. Evolutionists contend that vestigial organs are evidence for evolution because an intelligent designer would not incorporate a useless organ into its design.


So why would organisms have useless organs that consume resources if evolution were true? Wouldn't natural selection seed out individuals with these organs so that the more adapted individuals (i.e. those without apendixs or whatever) would have taken over?

Is all rationale and evidence behind evolution ultimately specious? It seems like pretty much all scientific evidence can be construed as supporting evolution, but perhaps there are other ways of looking at things?