Anything that can be done to prevent this is a net positive for users. Sites should never check browser UAs, and any problems that arise from a “wrong” user agent are the site developers’ fault for doing things incorrectly.
Apple made clear that they intend the iPad Pro to present a desktop browser view of the Internet, and has successfully defended their intentions against the wishes of developers to do otherwise. They openly said they’d be doing this and the result is exactly as they intended.
You shouldn't care about the device. You care if it supports certain features or APIs you want to utilize.
iPad users across the board now use a best in class browser and expect a best in class experience. Apple is protecting its users from subpar websites written by subpar developers, especially those who rely on lazy tricks like UA parsing.
