Not always, sometimes it’s just an acknowledgement of insurmountable facts. Pointing out the inability of a particular engine to overcome the laws of thermodynamics to output more energy than is input is not useful criticism. Pointing out the mortality of individuals is not useful criticism. Those shortcomings are specific, but unless there’s some alternative that doesn’t have those shortcomings, those aren’t useful observations, they’re pointless complaints.
Not always, sometimes it’s just an acknowledgement of insurmountable facts. Pointing out the inability of a particular engine to overcome the laws of thermodynamics to output more energy than is input is not useful criticism. Pointing out the mortality of individuals is not useful criticism. Those shortcomings are specific, but unless there’s some alternative that doesn’t have those shortcomings, those aren’t useful observations, they’re pointless complaints.