Miracles and god

Why do people give existance of miracles as a proof of existance of god?
In my view that should be exactly opposite....

Had god existed no one would need a miracle.
Assuming gods existance, offhand i could think of only two uses for miracles,
1. To leave a proof that god exists.
2. To remedy a mistake.

here 'god' means any entity that created and maintains the universe including the laws on which it runs.

I couldn't think of anything else..... (any takers?)
But even these two are mute. Had god existed there would be no need of proof. It wouldn't matter if miracles happened. God could have just embedded his existance into the very fabric of universe and then no one would have had wondered.

The second one is probably a tough one to refute... but i did it. But before falsifying it let me explain the concept in detail first.
The miracles (if at all present ) are a way to patch things up. To defy the underlying rules and just get things done. Sort of like using 'gotos' and 'break' statements in 'c'. But case study of any such situation, be it in software or any other descipline in the engineering, has shown that such a patch up either results in deteroiration of the system, and thus is known to be a _bad_ practise. Or it gets accepted in the fundamentals as a only known solution and the next generation of the engineers just start taking it for granted.
So if god used miracles as a way to patch things up (may be cause he felt lazy and didn't fix the real bug), the miracles will be actually the bad things happening to us.. (sort of like granting everyone's wish, turned out to be a disastor in the movie "all mighty") or it won't be a miracle anymore, but just a practicle solution that never was found before, and will be explained in very short time and won't remain a miracle anymore.

So basically if god existed, he would in no way require or allow for miracles. So when people talk about miracles happening, they are actually arguing that god does not exists, not the other way round.

[LIGHT BULB]: Whosh i am so clever!, now i am going to attempt to prove that "black is actually white", but let me have a motion to convert all the zebra crossings into yellow/red bands first.