I hear people say this often, but when you look into what they actually mean, it's often a comparison of having a single mediocre ISP CPE in a corner of an apartment, at most with a wireless repeater in another, vs. Ethernet. Of course the wire wins in that comparison.
Now put an access point into every room and wire them to the router, and things start looking very differently.
Where I live we have what seems like an unusual amount of fiber cuts... whenever the cable company or the phone company fiber is cut, at least one of the major wireless networks is offline too; maybe calls work, but data doesn't. They could potentially restore service through wireless backhaul, but they don't. They also rely on utility power and utility power outages longer than about 4 hours mean towers are going to turn off.
I am aware of a datacentre, whose principal fibre bundle transits a fast tracked development area where theres always construction and always fibre cuts.
I am also aware of a wireless backhaul path with close to 2 weeks battery backup, running entirely off of solar. They only truckroll of they get consistent bad weather.
I used to maintain an absolutely perfect 25km link that only went offline due to wind twisting the mast the radio was mounted on.
I also have maintained an absolute dogs breakfast of a network where customers frequently lost connection. Like daily.
I had one fibre link supporting 1000 customers or so, that the provider admitted had so many joins they could scarcely maintain it. And to add insult to that injury, they mislaid the service id, and would always take an adjacent service offline while troubleshooting it.
The technology is rarely the problem, its the implementation.
Wired connection is an absolute hack.