Inadequate staff is the only reason on-call exists. Sure, people might be mostly sitting around all night being paid and not being terribly busy.

But if a company needs someone at night, they need someone at night. Companies getting away with not paying for that is why oncall sucks.

In other words oncall sucks because companies don’t pay for solving the problems that require it. There’s no self correcting feedback.

A tool can’t fix that and oncall is not inevitable. Good luck.