The Pub

I was at the pub last night, after a fairly tumultuous day, which I won't go into here, however one of the people who I met there asked me about musical notation.
namely he wanted to know why we have so many different clefs and why we don't just make all of our instruments transposing.
I looked at him and told him he was nuts...how confusing would that be. To have a c on the staff but any variety of actual notes played.
Then I was like is that really more confusing than different clefs.
I still stick with yes. From a practical standpoint you want everyone to be able to play the same notes when you call out a letter name, and while good instrumentalists who play transposing instruments know exactly what's going on...
interjecting thought says that if you learn to read music with your instrument you just associate that space with whatever note it indicates on your instrument.

My explanation was based in vocal music. Notation was initially created by and for vocalists, and the different ranges of voices are separated by about a third (please correct me if I'm wrong) and this is why clefs are as they are...maybe

except for that c clef is move able

I don't know, I still think that having all instruments be transposing is nuts