Your working environment

I've worked in retail for most of my life.  With the exception of one construction job, and a couple of manufacturing jobs, most of my life has been in retail and most of that in grocery retail.   I've never worked in an office.  It's probably true that more of todays jobs involve office environments than when I started out but there are a lot of people who work manufacturing, retail and service industries who are not office workers.  Why do Web Masters like Yahoo write so many articles that relate to the business man/office worker and ignore the rest of us?