Norms and culture do the heavy lifting in a healthy eng team. So this is exactly the way to think about it -- not "what rule do we pass", but "how do we make {blamelessness,instrumentation,oncall} cool and aspirational?"
Yes, even more than managers. Engineers don't come up admiring and patterning themselves after their managers, or hero worshipping managerial skills.
Any behavior that gets praised, you're gonna get lots more of it.
If you praise people for staying up all night... you're gonna see more of it. If you praise people for *not* getting woken up for a whole week, you get more of that instead.
There are ways to acknowledge someone's time and sacrifice without glorifying it. Thank them in private. Apologize that it was necessary. Ask for their help preventing it.