Why did Titanic hit the iceberg?

Oh gosh i should've post about this topic long time ago!
Why did Titanic hit the iceberg? this is a topic that I was suppose to post at the end of October! but then why now? why is it that only now I'm going to post about this topic? Easy! it's because of my laziness, and I am terribly apologize about that. I know it's really not a good thing.

Well, anyway, let's not waste time and get started!

As we all know, Titanic hit the iceberg and sank and lot's of people died and so on.
But the main question here is, why? why did Titanic hit the iceberg?
Isn't Titanic a great ship? Why does it sank by only hitting the iceberg?
And in the first place, how could it hit the iceberg? wasn't there anyone controlling the ship?
What was the captain doing? Very careless isn't he?

So here is what I think.

The men who was suppose to watch over the situation, which is the "watcher" that was standing on top, was not doing their job properly. All of them were having a party that night, people from the lower class to the higher class. So, I bet even the watcher was caught up with the "party mood" and wasn't really paying much attention to what they are suppose to do. Perhaps hard drinks are even given to them for them to enjoy too.
So my assumption is. They consume some alcoholic drink and was feeling tipsy and can't focus well. So, even though maybe the iceberg was already visible despite the foggy environment, it took some times for them to notice it since they were feeling tipsy, and when they notice it, the distance between the ship and the iceberg is already quite near. Of course they would inform the captain after that, but did they do it fast enough? i don't think so. And even if they did, I bet the captain will have this mindset of " oh, this great ship of mine won't be in any harm even if it were to hit the iceberg a bit!". With this kind of thinking, perhaps the captain too wasn't taking an action fast enough to avoid the iceberg. Taking his sweet time maybe? or taking the situation lightly and didn't put much effort in trying to avoid it.
And so what's the result of all that?
What happen then?
BAM!
Yes, the Titanic sank because of the iceberg!