Praying Point?

I've been wrestling with this question lately...

Since God already has our lives planned out, and He already knows how He's going to answer every prayer we pray. Then what's the point in asking Him? I mean, it's not going to change anything, is it? He knows every prayer before we pray it, every desire before we do, He's God He knows everything! So, again I ask, what's the point in asking? I get the "you have not, because you ask not" but still....God's got the plans already finished, so why bother?

I'm not asking this be rude or to be disobedient, I'm genuinely confused about this concept right now. I continue to pray, knowing I am heard, but now wondering if it makes any difference.