You are 23 and you have 7 years experience in IT field, are you kidding me? Based on what you just said, you have a full time job when you went through the whole four years ( or more) in the university, what kind of school is it?
If everything you said it is true, then you are really a genius, off course this certificate is useless for you, and most of us here are just normal guys, this is why we can not understand you, this is why we still think this certificate is useful for our careers.
I think I benefit a lot from preparing this test. Off course the real project experience is not the same as passing the test, but when I was preparing for this test, I did study a lot of new things and got tons of new ideas, I am sure I will use some of them in our real projects.
This certificate is not just a paper for me, it gives me a lot even it costs me a lot, both time and money.