@HPuck35, how would you define “well-rounded”? I’m afraid we may be running into a “no true Scotsman” type of scenario here:)
MIT (and Caltech) appear to be valuing those who pursue fewer interests at a greater depth.
That said, I was always a firm believer in the approach that MIT, I recently learned, calls “applying sideways”:
https://mitadmissions.org/blogs/entry/applying_sideways