It was branded as art from the get-go, so everybody had to like it regardless of its shoddy controls and framerate. Naturally, its improved re-releases had to be admired as well.
My favorite anecdote concerns a German video game magazine that gave the original release a rather generous score (77/100) despite the reviewers not being convinced that they were playing a good game, then years later they elevated SotC to one of the most important releases of the decade, likely due to peer pressure and a desire to fit in with everyone else.
If you are looking for games as art, then maybe this is something you'll like. The same holds true for everything else that is commonly said to be art.
EDIT: Added paragraphs. Quick Reply still not fixed.
Anyways to OP. I'm gonna try and tell you why the game is so special.
Imagine a massive open world game. Where you literally can go anywhere you see.
Then imagine that from the beginning to end of this game you do no see a single NPC or quest marker.
Then imagine that there is absolutlely no hand holding what soever in this game or hints on where to go and what to do.
Imagine that at the start of the game you are already as powerful as you would ever be and your ability to finish the game has nothing to do with any new weapons or powerups you get (which there are none) but of your mastery of the games mechanics.
Now those bosses you mention, the game loop is simple. Navigate your way through the world to find one. Figure out how to neat it, then nagvigate your way around said boss to actually beat it. rinse and repeat.
It may not sound like much, but that too is what makes the game beautiful.... cause somehow it has enough to get you hooked.
There isn't and has never been another game like SoTC. There is an atmosphere and flow it has that no other game has been able to match. Especially when you consider that its the exact opposite in open world design that every other developer goes with. All other open world games try and give you so much to do, SoTC gives you just one thing to do.
All I can say now is that you should just try and play the game.