DD, this point is discussed under the thread “Inactive ones are bloodguilty?” Here’s my contribution, with a few additional points added.
As usual, their application is all wrong. He was talking to the Israelite watchman, standing guard (Ezek. 33:6). The next chapter [34] is a prophecy against the "shepherds of Israel." Interestingly, here he makes a division between "a lean sheep and a plump sheep, between rams and he-goats," and mentions that God's judgment would be directed against the plump sheep (Ezek. 34:17, 20).
Here one reads of the function of an Israelite watchman – 2 Sam. 18:24; 2 Kings 9:17. Reason it out: Would it make sense to use a fainthearted, weak or sleepy (= inactive) person as a watchman? A fearful or fainthearted person was not even allowed to join their army. They were sent home in case they demoralized their fellow-soldiers (Deut. 20:8).
So, the Ezekiel watchman scenario is very far removed from the tasks of a Christian evangelizer. It is rather directed at the leaders of God's people. Ezekiel was appointed as watchman to warn his people of their impending destruction because of their unfaithfulness (Ezek. 3:17 NET). Had he not done so, he would have incurred bloodguilt.
Watchtower theology also distinguishes between “anointed ones” and the “other sheep.” The watchman, an Israelite, had to warn fellow Israelites, which makes it an internal (Israelite) matter. So also, a spiritual Israelite(s) should warn his brothers (fellow spiritual Israelites) if/when they went wrong.
This is why they should rather apply this internally, e.g., some of those sounding the alarm, after finding out about the Society's involvement with the UN/OSCE, would warn “their brothers.” These were persecuted, either being silenced or kicked out of the congregation. So the application is much closer to home than they think and has nothing to do with inactive ones.