Ah, yes... but there's a vital difference between assuming, thinking and knowing. Each has its place, but the point along that continuum at which we feel we "know" something always needs to be properly judged. This usually means taking a bit more time, letting patterns of movement supplement shapes, and predicted locations, before formulating a conclusion. I don't think this process is different, thought the potential range and time required may vary, whatever you are using to spot, observe or target your quarry.
The onus, as you say, lies with the user, not just to confirm his/her target, but to familiarise her/himself with his/her equipment before taking it after live quarry. If so, it seems to me that the kit shouldn't be blamed in advance for any user error.
Would you feel 100% shooting a fox at 100 yds with one of these? Never mind any further, in all honesty?