Not at all short changing the team. But I could just as easily suggest that you were understating Bautista's importance to the team's. Not only his talent but his ability to handle the most highly leveraged situations at the end of a game.
I'm just trying to imagine Cano or Wells or whomever coming into a game in the 9th to protect a 1-run lead. I'm not sure of the exact number, but BBREF game logs show Bautista has done that 15-16 times this year. He most often blew them away with 2-3 Ks, with a handful of blown saves. He did it with 100+ MPH heat and a wipeout slider. It's just not the same with Cano throwing 94-97 and Wells throwing 92-94.
I'm hoping the team can adjust and still get the top seed in the AL playoffs, but it's going to take a lot of things going right.