Most guidance from writers for writers is worse than useless. I am not sure if they are trying to be clever, mystifying, or stupid with the guidance they provide, but the conclusion you are lead to is that it is impossible to give good advice to other writers. That’s simply not true, for if it were impossible to give guidance to writers, there would be no “Elements of Style”.
Fortunately there are writers who show it is possible to provide good advise. You can find it here in the LA Times: Janet Fitch’s 10 rules for writers.
Anyone who writes, be it for fiction or simply email, can benefit from reading this.