I'm generally anti-on-call, but c'mon, this is an unreasonable standard. No system is 100% perfect, never needing manual intervention to get things going again when something happens.
Any business that has a service that is supposed to be running 24/7 will likely need some form of on-call.
If a business can't or won't make those arrangements (and pay the bill for them) then maybe its management team need to recognise that fully reliable 24/7 operation is not something they can guarantee and they should plan accordingly.
My phrasing could have been more clear, I'm not saying you need a 100% perfect system and no on-call.
It's weird they're instituting on-call for everyone now, and I'm curious about the reason behind the policy change. I've heard of "on call for everyone" being used as both a response to programmers shipping unreliable code, and also as a preventative measure to encourage programmers to ship more reliable code.