Maybe they don't. I said from the beginning that I don't trade Freeman unless I get the package back I want. However, Freeman is a better and more complete player than any of those players. Santana is old and headed for a crash. Martinez is one dimensional and not a 1B. Hosmer signed an expensive contract in terms of money and years and isn't half the player Freeman is - IMO, Hosmer is fool's gold. Houston went into ST with the idea that they would use Gurriel there (as they did last year) but he's a 3B by trade and hurt for at least 6 weeks.
Again, I wouldn't trade Freeman unless I got a package back that was significant (similar to what I laid out with Houston). But, I wouldn't let the fact that Freeman is Freeman deter me from taking advantage of a package like that if it was available and I wouldn't sit on the sidelines waiting for someone to come to me. I would pick up the phone and let a few targeted teams know what it would take if they wanted him as see where it goes. If it doesn't go anywhere, so be it.