Players don't always get their way.
For one thing the suns can match any offer Booker gets on his next contract. So in essence he's locked up. Another thing, if Booker shoots his mouth off that doesn't mean it's an automatic trade for him...the suns might consider dealing him but they aren't going to take a bath in a trade. Look at Porzingis..he acted disgruntled and they floated the idea of trading him but he's still there isn't he? And I don't hear any peeps out of him right now. Players play the game and try to manuever the situation but it doesn't always work. Plus if they shoot their mouths off too much there could be blowback on their own careers and they could end up in a worse situation.
They are going to offer Booker the most that is allowed. They will keep control of him as long as possible. And if he demands a trade, they will politely say no.
But Booker has not hired Klutch sports so it should not be a problem.
The problem is when a player like Bledsoe, who you hope will be your third or fourth best player going forward (after Booker, Jackson, maybe Warren, and this year's pick) wants to be maxed out early. Its just an unreasonable request.