Don't worry, I was miffed about this for months before I finally did some research on the subject.
When you buy a laptop (or any computer), you are the super user, which they refer to as the administrator. That means you have control over what programs can be added and deleted from that computer. You can set up guest accounts on your computer so that other people may use it, but they have very limited control over what goes on with it.
When you purchase most Android devices (except for Nexus), you are the guest account on the phone, you have very little control over what can be removed (basically nothing that you yourself didn't add). When you root your Android you gain super user (or administrative) status.
Which means, now you're in the drivers seat!