The answer to the question is that God created dinosaurs for the same reason He created all of the animals.
There are human footprint side by side with dinosaurs footprints in a rock bed in the Paluxy River in Glen Rose, Texas. This seems to confirm that humans and dinosaurs lived at the same time, although apparently there is a debate going on on whether they were made at the same time, or if the “human” footprints are really human. Wonder why they don’t doubt if the “dinosaur” footprints are really dinosaurs. Anyway, it’s hard to believe that those prints were made 65 million years apart. If the bed rock was soft when the dinosaurs walked on it, how did that bed rock became soft 65 million years later without losing the dinosaurs footprints? There is also another place where human and dinosaur footprints are side by side, in the Turkmenian plateau in Russia.
I think that there is no “smoking gun” that proves that oil comes from dinosaur remains. In fact, some scientists believe that oil is produced by other means that have nothing to do with fossils, in other words, that it’s produced by the Earth, just like some minerals. If this would be true, oil reserves could be unlimited (as we still don’t really know the processes that take place underground), but we all can be sure that this fact will not sit well with oil speculators.
Sorry if what I say next is off topic, but after reading the rest of the answers so far, I want to say that on this matter I’m on the side of the skeptics. Not that I don’t believe in dinosaurs; what I’m uncomfortable with is the way many scientist seem to manipulate data. For example, how do they date the age of the bones of dinosaurs? The Carbon 14 dating method can’t date remains of a creature that lived more than 58-62,000 years ago (some say 100,000 years), and at the same time, it’s not a 100% reliable dating method, so… why do scientists say dinosaurs bones are 65+ millions years old? Not based on scientific data. There is a lot of inference but not a lot of scientific data. We’ve heard “65 millions years ago dinosaurs became extincts” so much that most accept it as a fact, but is it? The truth is that that figure is not based on scientific data. Although scientists will say it is, they face the problem that the dating methods used are not reliable, a problem they know is real but they wont tell us so.
Scientist today are view as “infallible” and “trustworthy”, close to being “saints”, when in fact they have the same human weaknesses that every human being has. People tend to believe everything scientists say, they give them all credibility, what amounts to “blind faith” in what they say. Science in the second half of the 20th Century stopped being a “vocation” and became a “profession”, even a way to become rich. When you think about it, there are millions of dollars given away every year for research in many scientific fields. Governments (USA, England, Japan, Germany), the National Geographic Society, the Smithsonian Institute, the Discovery Channel, the History Channel, etc., all of them allocate those millions of dollars every year and give them to scientists. Just like any investor, they want and expect a “return” for their investment. If scientists come back from their trip saying “I couldn’t find a single bone”, do you think someone will give them the money for the following expedition? Money plays a big role in this field. I read several years ago that a museum in Phoenix, Arizona paid 12 million dollars for the skeleton of a T-Rex. At that rate, who would go out looking for bones and come back empty handed?
It blows my mind to think that every “dinosaur bone seeker” that goes out looking for bones always finds them. Wherever they look for bones they find them. Farmers all over the world work the land every year and I’m still waiting for the reports of bone findings by farmers, but so far, only scientists can find them and only scientists know where to find them. One thing appears to be “true”: that dinosaurs “decided” millions of years ago to live as far away as possible from all the human settlements that were to be built millions of years in the future, and they also decided to be found by scientists. Their bones are always in some remote area, far away from human settlements. No kidding, land is moved every year for crops, foundations are dug for houses and buildings, but so far I have never read of a single dinosaur bone found anywhere in the world in any of these activities. On the other hand, every year scientists report their findings: every trip produces bones.
All this has put me, as I said at the beginning, on the side of the skeptics. The way I see it, the more we know about dinosaurs, the less we really know about them.