Damn right.
Well, everytime I read things, because it actually lets me enjoy things more (and enjoy more things). And better appreciate things whether I like or dislike them, while also letting me better understand and articulate what it is I like or dislike. Because, counter-intuitive as this might sound, it gets you closer to understanding fiction as, well, fiction — the craft, the structure, the way narrative art actually works.
You don't need it to be able to enjoy things, obviously, but it very much doesn't hurt. Like, you're talking a lot about how this would somehow 'ruin' books for you or 'drive you mad', but that's not my experience of it at all. Kind of the reverse if anything.
Anyway, happy new year everyone. Let the good books keep coming.