Does qualifying for D3 level sports with great academia get me into the MIT easily?

I would say not. Sorry. Being within D3 sprint times might not be enough. You need to bring more. Like D1 times since you are only average. With MIT, all applicants are very strong academically so I will put you equal to them as well. Being D3 good just makes you average again. You need more than that to get in “easily”. I say that lightly as I doubt anything will get you into MIT easily.

Sorry. JMHO.