Why would it be a joke?
First, surely you grasp that many people use these things called "speakers" to listen to music. Not all consumption is done with headphones.
Second, even if we narrow the question to headphone listening, the "failure" or "unsuitability" of Bluetooth for headphones is profoundly overblown. In 2023, gGood headphones, wired or wireless, sound fine if given a decent source.
I was definitely a skeptic, and while I couldn't set up anything like ABX testing, I have spent time trying to honestly compare my AirPods MAX to my price-peer wired Sennheisers run through a FiiO headphone amp.
The tl;dr is that it's POSSIBLE the traditional wired setup might sound a tiny bit better, but both sound REALLY REALLY GREAT. Any edge possibly enjoyed by the traditional setup was thin, and only evident in fairly narrow cases.
I was pretty surprised given my original bias against wireless headphones for critical listening, but here we are.