The people IDF is targeting are Hamas leaders or “officers”, who need to communicate a lot and sometimes even show in public, so they can be tracked with enough time. Boots on the ground soldiers are a completely different problem and Israel doesn’t even have the resources to track all of them because there are so many. How is that not obvious??
This may be true and it would be good to consider this when deciding what to do after Hamas is gone, but it doesn’t change anything about current situation. The fact is that thinking a military checkpoint would filter out terrorists is incredibly naive, and whether Israel cares about the lives of civilians or not likely wouldn’t change this particular issue at all.