For a great deal of reasons, but mainly for completely missing the point again: Eventhough most people won't even hear it, the wired variant does indeed produce better sound at particular frequencies because - here's the kicker - it's wired. Big surprise.
Ergo, you base your purchase on a list of criteria. Marginal differences in audio quality are meaningless for video games to me; I rather have the perks of mobility and simultaneous bluetooth connectivity.
For my guitar and music in general, audio quality is of utmost importance, which is why I'm content spending thousands of euros on my audio rig, including headphones.