Why are mosses called higher spore plants?

Mosses are considered to be spore-bearing higher plants because this is their main method of reproduction. Spores appear in the male sprout, which is different in appearance from the rest. And they are higher because they are divided into separate segments, like a stem, leaf-like processes, root-like structure, etc. After all, the higher plants differ precisely in this from the lower ones, in which the whole body is of the same type.