Waratahs have played at Paramatta stadium. But yeah you have a strong point, Sydney rugby union and by extension NSWRU and Rugby Australia only really care about the private schools in the East, that’s why the bulk of the funding goes to the private schools and also why Union by all reports has more or less died in public schoolsAh yes, union, that sport so beloved in Western Sydney that the Waratahs have never played a Super Rugby match there. It's an incredibly classist sport whose main supporter demographic has spent generations sneering at Westies.