Well, everybody operates under their own reasons, and what works for you might not work for somebody else. So, if you are happy with the performance you get with your scope, then more power to you. As for me, I have found that, ultimately, paying more now equates to paying less in the future. By that I mean that it is usually worth paying more for a quality product. For example, a higher quality scope will generally have adjustments that work as advertised, and are repeatable. This might not matter to a guy who shoots one load all the time, but as a handloader, I find scope adjustments that don't work well very frustrating. Another example of quality is the "pounding" that a scope will take and still perform. I have, in my life, occasionally fallen down and landed on my rifle and scope. I have also knocked a rifle or two over onto the floor. My scopes have all survived and still work. They will also withstand the recoil impulse, and continue to perform for years, which is VERY IMPORTANT if you have any money or time at all invested in a hunt.
Please notice that nowhere have I mentioned that the most expensive scopes are the best, nor have I mentioned the quality of the glass. Higher quality scopes generally have fine optics, certainly good enough for the intent, which is delivering a bullet to the aiming point. Optically high quality glass is extremely important in binoculars and spotting scopes.
Sorry for the long reply.