Here's the thing with flying, as someone who flew for most of her cheer career, and now coaches high school and all star, I'm going t0 say this all as nicely as possible:
1. The needs of the team change every year. Example: Most years I have more girls interested in flying than I actually need. It's part of life.
2. Size and weight matter. Yes. They matter. I said it. But they matter in comparison to the rest of the team. For example, at 5'2, you may have been the smallest, lightest, most flexible flyer last season. This year's talent likely included some that were smaller and more flexible than you. Another fact of life. There is always someone out there younger, more flexible, and hungrier for your spot than you are.
3. Coaches are in the business of building a TEAM. Not giving everyone the position that they want. Think about it. If everyone had their way, my Senior 3 would be 22 flyers and no bases.
4. Consider that the smaller and more flexible flyers are much harder to place on a team if they are NOT flying. YOU have the potential to do both. That makes you an easier to place girl. Putting YOU in a flyer spot leaves nowhere for 90 lb 5'0 Kelly who has no hope in the world of EVER basing anyone. What is she supposed to do? Nugget in the back?
5. Versatility in cheer gets you MUCH farther than being a "one-role" girl because you are more valuable to the team. You don't know how many "FLYER ONLY" girls get cut from college teams because, well, there are 40 of them trying out and most of them can't do anything except fly.