Its all about getting used to an OS. U can install programs through "add/remove programs" , "synaptic manager" etc.
For your question, I wud like to answer by another question. "Were u able to do all the tasks like installing, repairing, maintaining etc all by urself when u were a noobie to MS-Windows world? How many times did u call ur system engineer to ur home to fix ur OS/softwares/hardwares when u were a noobie and wasted 1000s of bucks?" Answer urself without any partiality and u'll urself realise that Learning is never a waste.
If u have any problems in linux, then there is an entire community eager to help u out. U have online step by step manuals available so that a kid can also understand and act accordingly. It far better than calling system engineers, isn't it?
If u wanna explore a lil further then read this => "
Linux : Making life easy"
If u wanna witness shock n awe of desktop environments then look here =>
http://ubuntuforums.org/gallery/
There is lot to learn in linux. Though u can do almost all the tasks in *nix without Commandlines, but learning CLI gives u an upper edge and makes ur computing far far better. U can never experience that in windows. U'll realise it only if u learn it.