Why Apple Seems so Reluctant to Adobe's PhotoShop?

Apple mentions that there has to be a direct connection between the platform provided by Apple and its developers so that they can jointly produce the best apps that the world has seen and hence everyone wins - Apple sells more products, and the developers reach a wider audience. This post is surely aimed for the critics and Adobe Photoshop Tech Support help number itself that Apple is missing out on something by not including Adobe Flash player on its platform.