But a counter argument is the less stress you put on the bullpen, the better.
A team should have about 1450 IP per season. If your starters only give you 750-800 IP, then the bullpen has to make up 650-700 IP, which averaged out to 93-100 IP per pitcher in seven-man bullpen. Of course, teams will use in excess of seven relievers over 162 games. But even if all 7 give you 70 IP apiece, that still leaves your depth to cover 160-210 IP per season, or about the same as a TOR starter. (Having a LOOGY who only pitched 20-30 IP. not only inflates this amount, but leads to other issues as well.)
While 5IP 0 ER is golden, the idea does need to be to minimize bullpen workload...