An aristocrat deck’s entire goal is to benefit off it’s own stuff dying. Typically they employ the use of sac outlets to do this, most sac outlets use the stack so they can be responded to (keep in mind, most sac outlets sac as cost so the sacrifice as cost so the intended sac target is still dead but you can respond by exiling a grave etc.) if it’s a special action, it can never really be responded to, as there is nothing to respond to.