Text is king for communication! :-)
I know "a picture is worth a thousand words" but it really isn't true. A text explanation of how to fix a computer problem is nearly always better than just a few screen grabs IMHO. SImilarly for user manuals and such. User manuals with a series of pictures and virtually no text explanation (avoids multi-language translation I guess) are rarely much use. Language (i.e. words) is an essential part of being human, it's how we commnicate.