Obviously the answer to this is both, but i want to know which one will be more important to you;
Do you want to play Breath of the Wild for the story, to find out what happens, to know where Calamity Ganon came from and what happened to Link and Hyrule in the past?
Or do you want to play Breath of the Wild to explore the world, to see its mysteries and discover things in Zelda we've never seen before?
Which has your attention more, playing to know what happens or playing to see what the world holds?
Do you want to play Breath of the Wild for the story, to find out what happens, to know where Calamity Ganon came from and what happened to Link and Hyrule in the past?
Or do you want to play Breath of the Wild to explore the world, to see its mysteries and discover things in Zelda we've never seen before?
Which has your attention more, playing to know what happens or playing to see what the world holds?