1.) What state are you in where you are the best freshman? I'm from Illinois, where every single year I feel a freshman runs sub 9:30 for the 3200, aka the same pace as the 4:46 you were bragging about for a whole mile more.
2.) You are a 15-year old kid, yet you are challenging the knowledge of adults with years more running experience and much faster PRs. You are trying to make the argument that the training programs of every good coach that ever was are all a bunch of BS. Do you really think you know more than Alberto Salazar? I know Galen doesn't run all out 4 times a week.
3.) Very, very few freshman go into high school running 45 miles a week. Most coaches don't have incoming freshmen do any workouts at all over the summer, opting to build them up a bit first. The other freshman in your state are going to get much, much better, and probably very quickly. That's because they will start doing speed work in October, when their coaches tell them to, and then their times will really drop in late October/November.
4.) I have 3 college teammates who ran sub-5 in middle school. I go to a NCAA Division-III school. Great runners, obviously, but hardly superstars.
5.) You are less than a month into your high school career. Times may be great now, but know that this could all go south really quickly. We didn't say that child prodigies burn out as soon as they enter high school. It's after they graduate that we see who really made it.
I don't want to be too hard on you because you are only a kid. But please, for your sake, do not be bragging about times you run the first week of September. If you can't replicate this success in November, none of this will matter. You need to be able to sustain this intense training for 2 more months. If this actually works, great, but I doubt it will. I urge you to take the advice of your elders seriously.