Yes, but it matters how easily. Wired is not perfectly secure, but I can't invisibly breach it from two blocks away with a shotgun antenna either. That's the real problem with wireless--the traffic is freely accessible. In theory strong encryption would make that moot, but WPA2 is the best we have, and it's not what I would call weapons grade. If someone really wants your wireless traffic, they can probably crack it with a modest investment in Amazon AWS compute power, or spoof the initial connection if possible. And that's wifi--cellular is even more vulnerable since there is no authentication to the cell tower.
That said, I send passwords over WPA2 all the time. How can you not and still function in modern society? People put up with wired if the machine they're using isn't portable, but now we all carry supercomputers around with us on our belts or in our purses, and wired isn't going to fly there.