That's not strictly true these days, given that T-Mobile offers home Internet access via 5G and also Starlink, though neither of them are a replacement for a hard line.
neither tmo nor starlink work where i live. tmo would need to spend money to serve me, and i'd need to spend thousands of dollars or rent a bulldozer and learn to use it to clear trees. Fixed wireless would work if it wasn't on the 2ghz+ bands (i know because i had this, too, until at&t canceled both versions)