The importance of the OS...

I wonder how comes there are so many people out there than don't really understand what an OS is, and how any restrictions on how the user work on it really affects the user.

The work of an OS is to act as an intermediary between the user and the hardware itself. In a nutshell, the OS job is to take user input and to tell the hardware what to do in order to get the desired result. Then, it takes that result back to be displayed in a way the user can understand.

Not every OS does this in the same way, all depends for the environment a particular OS is designed to work at. Not only that, it also changes because of the way the designers of the OS thought it was best.

In many ways, what OS is better comes down to what it's expected from it. Like any other tool, an OS can be customized to better suit the needs of the end user. Those needs are the same most of the time, that's why general use OSes like Windows, OS X and many of Linux distros are what most people need. Their purpose fit well the computing needs of the average user, since all that they need to do on daily basis can be done with a general use OS.

The only specific case OSes out there on general user, are those used on mobile phones. These OSes, like iOS and Android, are specially coded for use mobile phones, since they have specific needs to be accounted for.

In many ways, the OS is what allows us to interact with our computers and our other electronic devises. And the user should be the one controlling how the OS works, not the OS controlling how the user work. Not only that, since the OS is a vital part of our systems, we need to make sure that when we install it on our computers all the keys on how it works are given to us. Even if we don't use all the keys, there is no good reason for the vendor to hold back any of them.

No matter how good an OS is, if it restricts users freedoms or not allows for user tweaking, it should be avoided like the plague. User safety is not a good reason to restrict, or take away, any freedom from the user. The user should have all information at hand to protect his system.