It's quite simple
Linux an other Unix like OS's have a well designed and developed file system. That system is well designed enough to keep the system away from the user space so those who obviously don't know the system well enough can easily be kept away from screwing it up (unlike windows), if you want to get the best out of it go away and learn how it works, if you can't be bothered, don't, but if you want to not come across as a bit of a moron, don't make comments that just show your ignorance.
Linux / Uunix OS's are designed to be scalable, multi-user systems, Linux being open source makes it very versatile as those with the knowledge and imagination can hack it into an OS that can be used for many different purposes if you can't ge you head around it, or can't b bothered who cares.
