I'm Just Sayin'

Something about the phrase "I'm just sayin'" pisses me off.
When you say something, it's said, we get it, we are standing five feet from you, we heard it. There is no need to tell us again that you just said it. It's over redundant.
Some people say it as if to defend what they just said, ie:This chicken tastes like fried assholes, I'm just sayin'. As if those three words make the previous statement less offensive to the cook. If that's what you look to accomplish, use a different phrase like:Your painting looks like a 4 year old did it, but you're still cool. At least that has some more positive backing.
Think twice before you "just sayin'" because you don't want to come off as an over redundant loser that doesn't have a big enough vocabulary or enough to actually talk about that you have to repeat yourself, but you're still cool.