Dude, there are three glamour markets in the NBA: LA, NY and Miami. There are a few second-tier big markets like: Chicago, Bay Area, Boston or maybe Philadelphia. Everyone else has a hard time keeping their players and attracting free agents. Dallas couldn't attract a single big-name FA to play with Dirk for like 5 years after Dallas won a chip.
LMA wanted out of Portland.
Carmelo wanted out of Denver.
Chris Paul and now Anthony Davis have wanted out of New Orleans.
Shaq and Dwight wanted out of Orlando.
Vince Carter, TMac and Chris Bosh wanted out of Toronto. Now keep an eye on Kawhi...
Etc.