Doesn't mean they can't be frustrated. Players want to get paid, but they like to win, too. If they see the team that is paying them isn't doing everything to win, I'm sure that doesn't sit well.
It's taken years for a lot of our fans to figure out that the Joneses aren't going to go after top free agents. Just because a player re-signs with us doesn't mean that they know we are not going to do it.
Now, I agree that both Lawrence and Lewis would have re-signed with Dallas if the money was right, but now that they are gone, I see no problem with them saying they were frustrated by it.