I do have to say that I am not a fan of hs kids transferring for athletics. That's what college is for.
I don't have any experience with being the parent of an elite player but I do as a parent of a good player who was displaced by kids that transferred. We had 5, 4 and 3 kids transfer to play basketball at my son's grade level during his freshman, sophomore and junior years. 12 new players that weren't there when the local kids were in 8th grade. That doesn't even count the ones that came in the grades around him. We had 40 kids playing travel basketball in his 8th grade class with two top playing at the top 'A' level. By their senior year there was only one still playing and he was on the jv.
Most of those kids didn't move into the district but claimed hardship or faked an address to get in. I have heard of parents who have had 'marital problems' and the father moves into an apartment in the desired district. After the child's sports season is done they miraculously reconciled and he moved back into the family home.
That's an extreme example but if one or two come in it has a big impact on one or two local players and their families.