You're comparing oranges to apples. Silen Hill is a horror game, and not knowing where you're going or what you can find helps the atmosphere. Pokemon is not a horror game, it's an RPG in which exploration in search for pokemon and items plays a fundamental part, especially now that they are focusing so much on the open world aspect of it.
yes I know, the comment was meant facetiously.
My Console Library:
PS4, PS3, PS2, PS1, WiiU, Wii, GCN, N64 SNES, XBO, 360
3DS, DS, GBA, Vita, PSP, Android
Top 6 this generation:
Bloodborne, Sekiro: Shadows Die Twice, God of War, The Legend of Zelda: Breath of the Wild, Dark Souls III, Red Dead Redemption II, Rock Band 4