The real problem with my really specific writing advice (she says parenthetically) is that it tells you, really specifically, how to write the kind of stuff I write. Or at least, what I want to write. Or what I want to read.
Now, I’ve been paid actual money for writing and for giving my opinion of what I’ve read, so there’s that. But so’ve other people who write and read completely different things, and they’d give you completely different advice, which potentially would be much more useful to you.
Which is why, I think, most writing advice comes down to trying to help new authors figure out their own style and other vague soul-searching type things. It’s accessible to a greater portion of the population and it doesn’t stifle styles that may be inclined to do things entirely differently.