Sneakylong
I'm not sure of that at all. For one, Koepka's already accepted "sportswashing" money by having played in at least one SA event previously. Plus the main difference between the players who have gone to LIV, versus those who you listed is AGE (also, McIlroy already gets millions from PGA by being on their board). If a player is good, healthy, and young ... they would be nuts to go over to LIV right now. It's too much of a gamble that it might not be around in a year or two. If there was a guarantee that they would be around for at least 20 years ... who knows?
BTW, "sportswashing", per current situation/evidence, may be the least effective move ever. Given SA has hosted tourneys since 2018 ... and yet we're talking about their human rights/atrocity issues more now than ever. It hasn't really washed away anything. I'm not even sure who these fictitious people might be who would just forget about, or not be able to separate a golf tourney event result from a regime's human rights status.