Pitch until dl, next guy up. You’ll still probably end up with better results than a bunch of long men pitching at a level that they can go two or three innings at a clip
With guys pitching 4 times per week, every week? I highly doubt it. You'd either have 10 guys on the DL by the end of June or they'd have ERAs in the 6s. Have you ever tried to pitch 3 times in 4 days? Know what your arm feels like that last time out?
And why would you pitch guys until they get hurt? You'd very quickly be down to having guys like Solis and Jimmy Cordero pitching in the 8th and 9th innings of close games. Theh the next year you'd be able to sign exactly zero free agents to replace them given that abuse.