5 Reasons to Jailbreak iOS 10 & iOS 10.2 and 6 Reasons Not to Jailbreak

Jailbreak to Install Cydia Tweaks and Apps

The biggest reason to jailbreak is to install Cydia apps and tweaks on your iPhone. These can do all sorts of tasks and change the way you use your iPhone. 

It is not about pirating paid apps, but finding apps that Apple doesn't allow in the app store. 

If you want to have more control over your iPhone and what apps you can use on it. If you love controlling your phone and there are things you cannot do stock, this is perhaps the biggest reason to jailbreak iOS 10 and iOS 10.2.