Even when Amulet of Vigor doesn't show up, Spelunking and Urza's Saga serve as redundant copies
If you do it every game and tutor aggressively to do just that, people will say Oh, thats ALL that deck does and will probably be NOT OK with it
Aside from Kaima, the Fractured Calm and Danitha, New Benalia's Light, I see this more as a general use card than something with a specific home
While Drag the Canal is a card I'd be fine to have against a deck like Azorius Soldiers or Mono-Red, it seems awful against Domain and various Midrange Strategies that use cards like Raffine, Scheming Seer, Sheoldred, the Apocalypse, and Wedding Announcement // Wedding Festivity to go over the top
As prices rise and the theoretical loss increases, justifying opening a box for anything but entertainment value becomes incredibly difficult
Nowadays, there are many more defensive abilities, some with the actual protection keyword themselves