As for saying DeRozan has no pull whatsoever on players in Free Agency is just basing it because you don't like the player. He isn't KD. Or LeBron. Obviously. But he's still an all-star, who we hear nothing about him being unliked in NBA.
If you were to say Dwight Howard no longer has pull in Free Agency, then that's something we can tangibly put value on.
Signing an All-Star like DeMar entering his prime (while there are better options, I agree. He isn't my first choice, nor is DeMar the first guy I'd go after). Him signing with us, is actually still a good thing for the franchise. You'd get an all-star entering his prime. That will have pull. Team will improve. Which is also good in Free Agency.
You want signs that the team is going in the right direction. DeMar DeRozan would be something tangible.
Let's put it this way, you sign Kent Bazemore, not only are you getting a player that isn't nearly as good as DeMar.... Granted better 3 point shooter, and a better defender. DeMar is the better overall player. Highlights how much of a gap there is on offense between the two outside of Kent, who is a good, but not great 3 point shooter. And decent, but not great defender. But also, the pull Bazemore has on Free Agents is pretty much nothing.
If you're Hassan Whiteside... Bazemore isn't moving the needle at all. It could even hurt. If it's DeMar, there's a lot more to consider.
Bazemore is also same age as DeMar.