I think people like your friend that said “who controls dreams, control everything” are misunderstanding a simple thing:
The movie “The Matrix” and LDing are NOT the same thing!!!
In “The Matrix”, when they are in the “Matrix World” (which, for NEO at least, looks A LOT as an LD for us); They can control everything, and in the end, NEO changes the “Real World”;
But if you live in OUR UNIVERSE, OUT OF THE MOVIES; LDing is just a way to enjoy the life 100%, even when you’re sleeping!!! And if you’re worried 'bout “listening what your dreams have to say”, in a LD you can just ask: “what I was supposed to hear in this dream”; then, probably, your DG will tell you about that; And after all, Who understand what our dreams says in deed nowadays???