You’re ignoring the obvious. They left because with less Lasix some horses bleed. And they don’t know if SA will keep racing, and may not think the track is safe. California (Rick Arthur) has always been the toughest place to use something. Other than Miller none of those guys were getting jumps in Cali, and his horses stopped running everywhere. Not just there.
Ali racing is in real trouble, getting stalls elsewhere is a business decision.