You are. I would suggest a freshman level statistics & probability course 
Can someone help explain for a newbie - If Dedicated has around 800 workers and is finding most of the blocks in that pool, why would we want to move to a smaller pool finding less blocks... I would think that by being on the bigger pool and finding most of the blocks, we may not get as many shares but at least we would get _some_ shares from most of the blocks... Or I am thinking about this from the wrong angle?
You are being mean.
I also did not understand it until I read some more about it.
Try http://learncryptography.com/51-attack/
Basically, if someone controls 51% of a coin it could lead to an attack that would enable double-spending and functionally ruin the coin.
what is fork? really. what does it mean?
Fork is a different "version" of the same coin, in layman terms. It basically means that the coin has split, and since it's a Peer-to-peer network for transactions, it depends who your (network) peers are.