This exactly. If the developers responsible for the problem (and the fix) aren't feeling the pain of being on-call, then nothing will change and the fallout will be left on support/ops (who will usually find a poorly thought out workaround).

Do developers need to be on-call to handle purely ops-related activities (low disk space, high system load, etc)? Absolutely not. Should developers be responsible for their "production-ready" code when it breaks? Definitely.