LMAO you realize the MGS franchise is the most in detail with the story.
Telling someone it's ok to skip games in this franchise is like telling them they can watch the last LOTR movies return of the king without having had seen the first two LOTR movies and the reference would catch the up. Just no no no.
MGS is the last game you want to skip on to sequels. Most of MGS4 is cut scenes vs gameplay. This isn't god of war or uncharted where a noob can start at part 3 and be ok.
This is a series where the story connects through all the games unlike any other games.
you seem to be misunderstanding something. Yes, mgs is about the story, nobody will dispute that, BUT you don't NEED to know the history of the first game to get into the 2nd and third. Also LOTRO is far different than MGS and like someone said, if you need to compared it to LOTRO you already lost.