**another example**

It's just about last light and you shoot a deer. Not exactly sure where it's hit but your feeling is not a great shot. There's probably 10 minutes of light left. You get down and check for blood. There is a decent amount of blood but definitely not pure lung blow out blood. You push on anyway because it's going to be dark soon. About 100 yards away you jump the deer. Can only find very little blood after that and never find the deer!

Is this being lazy or lack of education on what to do after the shot?

Backing out and coming back may involve too much effort for some people IMO. Again you have to make an extra trip back to your vehicle. Tracking at night with lights is too much of a burden to them. You have to go slower and it's not as easy. The person probably has plans that night or would rather be in a nice warm house watching TV.