A few years ago I had the honor (lol) of having to spend weeks in Omaha for a project. Well I just so happened to be staying in the same hotel as some of the Big 12 teams in the NCAA volleyball final four or whatever their tournament is. It was whatever year the SDSU jackrabbits made it because I remember their huge bus being obnoxious (I guess other teams flew).
Anyways, I was taking an elevator to breakfast one morning and in walks the Nebraska volley ball girls and I immediately knew my niece would never be a D1 volleyball player, despite her earnest desire. Each of these girls dwarfed me, and I’m 6’1. Their quads were as wide as my waists and their wingspans were impressive for any man. I’m talking 6’6 women. This was Nebraska but I’d see the same from Michigan, Baylor, and Tennessee. My assumption from that experience was the blue blood schools are getting the best breeds and stock of girls, and if you aren’t 6 foot+, it might be hard to get a look unless you are like the lone position where it’s okay to be a shortie.
I say all that to say and to your point, unless your girl is going to be tall (and you can generally tell by teens) then you might start focusing your investments (time, mental, physical and monetary) elsewhere. Much like a kid who loves basketball but at 16 is still 5’9.