Why aren't beneficial traits evolved more often? (Talk.Origins)

Claim CB928:

Why are beneficial traits not evolved more often? If wings were beneficial for protobirds, for example, why have they not evolved on gazelles and apes?

CreationWiki response:

This is not a Creationist claim.

Note that no source is given for this claim that is because there is none.

¿Por qué los rasgos beneficiosos no evolucionan más a menudo? (Talk.Origins) Por que as características benéficas não evoluíram com mais freqüência%3F (Talk.Origins)