Kinda hard to figure just what Ma Bell was thinking in those days (ETA: Meaning, as far back as the late 1960’s). Touch-tone was fairly new, and all the (significant) phone companies (all ONE of them, to-wit Ma Bell) were heavily pushing it in their advertising. And yet… And yet …
When you actually ordered a touch-tone connections, it cost MORE per month than a pulse-only connection. (This was true at least as late as 1971 or 1972, when I got my very own phone account for the first time.) So I order a pulse-only connection. I asked the customer rep on the phone the obvious question: If you’re so pushing to move everybody to touch-tone, why do you charge more for it?
Customer Service rep: (mumble)
Note, in those days, you didn’t get any useful value (that I knew of anyway) out of having touch-tone. This was long before you could do any sort of data-by-telephone activities, like phone banking or bill-paying or trekking your way through Og-awful phone menus, etc. Although certainly, the phone companies knew and intended that this would be the future of telecommunications.
ETA: Modern-day automated phone answering machines with those voice menus are high on my list of inventions the world didn’t need.