I don’t think chasing Iggy is about weakening the warriors, even without him they are a championship caliber team.
I think the most important thing for contenders is stacking up against the warriors. Spurs, Cavs, Rockets, and Celtics can make win now moves. The middle class of the league has to make moves for deeper playoff pushes. Teams like the Wizards are just on the cusp of joining that group.
For most everyone else the goal should be focusing on the future, developing the young guns and picking up quality veterans as mentors. That’s where someone like Iggy comes in, with pedigree and experience to help a younger player grow on and off the court. But I think Iggy might prefer the rings.