>>58122130
The reward for it is too late in the damn game to really justify the effort put into the fucking thing, especially when you'll already have even better Water types by that point. Like if you put the effort into finding a Feebas that's earlier in the game that's infinitely more bang for your buck than wasting your single Deep Sea Scale for Gorebyss
And there's infinitely better options like Swampert, Gyarados (which didn't need to be in this game), Ludicolo, Whiscash, Wailord, Crawdaunt AND Kingdra, which is just as hard to get but actually worth the effort. Even Pelipper or Tentacruel are still better