It's an apt comment. You think everything about Dallas is the best. You bristle at criticism of the Cowboys. No matter what Jerry does or shovels down your throat, you swallow it whole. Here, you seem incredulous that someone would chose to play in Philly over Dallas.
I think the Star in Frisco is great. But it's likely not a massive factor in signing guys, especially a guy like Leonard who is at the point in his career where location isn't as important as fit, chance to win, chance to play, etc. In Philly, he'd be going to the team that is the current favorite to win the SB. Given injuries to their LB corps, he's likely to see more PT in Philly. They may even offer more money given the situation they have at LB.
The Star is likely not going to be a factor at all. I suspect if he chooses Dallas it's because we either paid him more or that he's tapping into the relationships he has with guys like Gilmore than he's friends with and that gives him more comfort playing here than in Philly. He may also think Quinn can use him better than Desai in Philly.