Normals are indeed supposed to be the "Casual fun time" mode, and people aren't usually trying as hard in normals as in ranked, but that is, again, no reason you can't get better at the game. You can still learn. There are still going to be normal games where you lose, and those are the games you can learn from. In any situation where someone beats you, you have a situation where you can learn. The difficult part is taking the opportunity and finding the lesson to be learned, then applying it to future games.
Also; I never said a bronze/silver player will secretly be diamond just because they haven't played ranked. Playing ranked is, as you say, possibly the best way to get better, but it isn't the only way. Also, I'm going to take your other reply and respond here to keep the arguement clean and collected;
You say that people at silver and bronze aren't bad because they're silver or bronze. But I have yet to see someone get diamond from Silver/bronze in 150-100 games.
This is a given. Climbing isn't easy, and I've never implied it is. In fact; It really SHOULDN'T be. Here's the thing though; The question isn't wether a Bronze/Silver can be diamond level, the question is wether or not a Bronze/Silver can be good at the game, and that's a whole other thing.
And actually; This arguement works in MY favour, not yours. Since climbing is a slow, difficult process, just like this arguement suggests, that means that a Silver player whom is trying to climb can still be good at the game, just not high rank yet.
So Castanean, I can only assume you mean you yourself aren't bad because you are(were) silver, so I challenge you to get diamond in 100 games.
Believe it or not; I'm NOT talking about myself. I still have a lot to get better at. Besides, if I were narcissistic enough to actually BE talking about myself, I would probably make that pretty clear. I wont call myself "Good" at the game, but I wont say "Bad" either. Just... "Decent". I can say one thing though! I have never been bronze. Something I am fairly proud about. Go ahead, look it up. I really haven't.
Oh, also, a quick note on something that could be misunderstood;
Well, he's gotta learn at some point.
Just to make it clear; This was not meant as a direct insult or anything like that. It was meant more as an "If he doesn't know how to argue" Which you've clearly proven you DO know how to do.