I agree with the author that writing is one of the most undervalued skills for SWEs, but for a completely different reason - it forces you to reason things through properly, even if nobody else will ever read what you write. Writing a couple of pages of design docs or an Amazon-style 6 pager or whatever might take a few days of work, but can save weeks or more of wasted implementation time when you realise your syste…
I agree with your point and I also think English is imprecise. It's great for socializing and flushing out ideas but it can also give one a false sense of confidence.