that really really depends, friend.
you are making a blanket statement which really is only true in certain circumstances.
wireless CAN be indistinguishable if you can rule out interfering factors.
Playing wired gives you a stable uninterrupted connection.
Wireless can be fickle, especially if there are multiple users and you don't have the best internet.
As a rule of thumb, you are always better off wired.
But i completely agree with you if you live alone, noone else uses your connection and you have the equipment to run a high transfer rate wireless, then there is no big difference to a wired connection.