You'll have to elaborate an argument on that. You can't just come and type those words.
Imagine yourself in 1986, now consider that all the games you played prior to 1986 were 10 minutes long, 90% of them had no story, 90% of them had broken controls. This was, in short, the atari era which caused the videogame crash back then but that is what video games was about at the time. Some of us didn't like it, others convinced themselves they had fun with circus atari and kaboom.
Imagine a game were the world is not only open and HUGE for 1986 but it gives you absolute freedom about where to go, what to look for and in some cases, how to progress in the story. There is a SECRET almost every 2 blocks of the map. There are more items to use than the amount of items 10 atari games can gather together. The dungeons, each one present a different challenge, sometimes fierce enemies, sometimes secrets to be revealed. The world is so full of secrets you can hardly believe there was all that under trees, under or behind rocks, under water ponds.
When that game was released, it was the most creative and massive game in the existence of videogaming, of course you know you have 2 different quests which just added to the game's greatness.
LoZ did to the industry what Oot did with 3D gameplay elements. It was a revolution, as big as it gets.
the game is timeless, regardless of our opinions on the board.
Videogame history owes that game so much, the game is untouchable. Like I said, like a holy bible to a catholic.
EDIT: Damn, I am confusing the dates. It debuted in Japan in 1986 and in 87 in the US.