For Example, root access is absolutely contraindicated in Android Pay, don't like it, and various Bank applications and antivirus (well here at all for obvious reasons). And even if getting root on your Android device, you will hardly be able to hack the banking system, using only the client application, the banks consider that you agree to allow the attacker to gain complete control over your device and sacrifice their own safety. In part it is, because the root is played only for advanced users that understand what the consequences might be in a position to weigh the pros and cons of such decision.
Get Ruth-access on device with Android often gives the user a lot of different privileges and buns. But in our modern world where more attention is paid to security, root access at the same time bring some disadvantages, because it is a potential security hole, or simply too many possibilities for a user, where this should be avoided.