We did not invent words to carry knowledge and improve oir culture, we invented writing, and guess what, alphabets and words only came in thousands of years after that. Before it we had cuneiforms and various forms of pictograms, so don't assume the superiority of strictly alphabetic languages over other forms of communications.

Let's take english as a language, its capacity to convey emotion is quite limited as it was not born a language for literature. Language evolve, new forms of communication are born and merge with existing ones and together they are more powerful. It's not like we will switch to emoji only, altough if an emoji only culture existed, they would frown upon our "inexpressive, needlessly verbose weird letters" just like you are doing. Don't underestimate the scare of cultural changes over convention choices