So we should only sign players who already have a notable international profile?
Of course not, but create a balance. It's not only us though. Sponsors want a league with the best players and most exciting talents. In order to generate money, you need to have the best players, or at least some of them. Imagine if Durant, Lebron, Kawhi Leonard, Westbrook, and Anthony Davis moved to Olympiakos, CSKA Moscow, Panathinaikos, Barcelona, and Real Madrid. The Euroleague would arguably become more popular than the NBA.