Writing is a craft or art learned and refined through skill.
I'd argue that it is.
I would probably draw a line between writing and vernacular speech, in the sense of language acquired simply through assimilation and not specifically trained or drilled.
There might be writing which fails that test (e.g., very basic literacy), and of speech which passes (advanced rhetoric, debate, accents and impressions, singing, etc.).
But as a socially-acquired means-to-an-end refined by practice and study, yes, technology.
