People who are a lot older than 15, and have been around the block a few times think you should major in a non-aviation field. At age 15 you simply don't fully understand the real world...but you are ahead of most by thinking about these things early on. If you get furloughed or medical out, a relevant degree will at least open a door in another career. Flight Ops degrees are like a degree in welding, not good for anything unless you are a welder...and then still not good for anything.

You are falling into the trap of finding ways to justify what you WANT to do, not what is the prudent thing to do. Of course majoring in Flight Ops would be fun, I enjoyed the 6-8 months which I spent getting my ratings...it would have been a blast to extend that for four years! But not very prudent financially

Of course if you have a large trust fund, which will keep you afloat in comfort even if you get furloughed or whatever, then knock yourself out, it's your money. But if you plan on trying to actually earn a living in aviation, better get in the habit of being frugal early on.

Also you forgot the two BEST schools, at your age you should be considering these too.

US Naval Academy
US Air Force Academy

In that order ( )

Purdue and UND are fine, but again if money is EVER going to be an issue in your life, consider the cheaper state schools.