Yeah, it doesn't make sense at all.
Digital and analog terms refer only to ways of measuring and calculating. And it those situations analog systems compare the measured with something. E.G. length of the table with a meter stick, passing of time with angle that clock hand travels, volume of liquid with glass that contains it....
Digital measuring is a bit harder to picture as it consists of turning the measured property into numbers that can be accessed and manipulated later without relation to the original measured thing.
Needless to say, analog systems are much older hence the association that old technologies are always analog and everything new is digital. Also, as digital systems need electricity, we tend to call digital everything that contains battery.