No, unavoidably unsafe means that there are inevitably some who will be harmed from vaccines. That’s why there is a vaccine injury compensation court created to begin with.
Legally, unavoidably safe means they’re not liable. The compensation court is there for the avoidable cases, meaning some specific defect in the production of the vaccine.
You’ve got to stop using terms fed to you by your fellow anti vax cultists which are being misunderstood and misapplied.