Land lines, while they may seem quaint now, were the most influential technology ever to exist when they were first introduced.
Prior to the telephone, there was no available method of voice communication over long distances. Nor was there any available method of synchronous communications across long distances. If you wanted to communicate over a distance, the fasted available method was the telegraph, but you had to travel to an office to send a message, and it took quite a while to send, and a response might be long in coming. The same communication could be carried out in real time, from home, over the phone, in just a few minutes.