I also think Al Nassr would be better off bringing in players to strengthen their defense. I don't really mind young players wanting to move to the SPL. But there are also national team coaches who have a problem with their young players pursuing a career in the SPL.
Currently, the SPL is getting more popular by bringing in top European players and it is working. Bringing in young players will increase the competition. I think it will be good enough for the development of the League.
When their League gets better, it will refute the perception of coaches who think European players pursuing a career there do not have an increase in performance.
I agree with your point about Al Nassr needing to strengthen their defense. Bringing in top European players to the SPL can definitely help improve the league's overall quality. As for national team coaches having concerns about young players moving to the SPL, I believe that exposure to different playing styles and higher levels of competition can actually benefit their development. So, I think it's a positive step for the league and for the players themselves.