Then why would you let them sit there in watch with the bases loaded in the 8th inning when the game is on the line, just because it's not a "save situation" yet? You could close out most of your three-run games by letting a freaking shortstop come in and pitch. Managers probably waste a third of their closers' appearances, and they lose games they should win because the closer never pitches.
I'm not talking about a closer by committee. I'm talking about a manger who goes to his best relief pitcher and says, "You are my closer. You are my stopper. I'm going to use you about 70 times this year, and I'm going to use you in the situations when I think the game is on the line and I need outs. Most of time that'll be in the 9th inning, but sometimes it'll be in the 8th with the other team's best hitters up, and sometimes it'll be in a tie game with runners on base. I'm going to use you whenever we need outs the most, not whenever the stat sheet says you'll get a save."
"Closer by committee" is a euphemism for "we don't really have anybody very good at all in the bullpen." That's not what I'm talking about at all.