Hello,
Indeed, and I question the quality of a tutorial that presents such a misinformed directive. If you're going to use a tutorial in the development of your site, let it be for usability (to improve the experience of your visitors). Don't be embarrassed by asking questions and don't let yourself be intimidated by responses. A few years ago I might have asked the same question, and because of excellent advice from people like Jill, Randy and Qwerty, my sites have done very well, and ultimately, I ask increasingly better questions.