Does simple have to equal easy? An abacus is very simple, but its not easy to do advanced mathematics on it without prior training.
laughs in Simple Mail Transfer Protocol
Imagine that your protocol for choosing dinner with your SO is:
You: What would you like:
Them: I don't care.
There, simple! Getting some useful information out of that is an exercise left for the reader.
It's not really helpful when people try to describe IRC as easy simply because it resembles text based paradigms that developers are familiar with.