The question we have for you are simple ones: why do you wear a helmet, gloves, boots, and jacket? Why do you buy INSURANCE?
In case of an accident! If within the first fifty (50) miles after an oil change, a rock hits your radiator or the thermostat sticks, the water pump stops pumping or whatever causes a major heat problem in your cooling system, what would you rather have in your engine? A mineral oil that acts like butter, which burns up and evaporates very quickly and also carbonizes? Or an oil that can handle high RUNNING temps like synthetics (325°f to 367°f)? High quality oils are INSURANCE not only maintenance. The same is true about brake fluids and gear oils.