Isn't the need much greater in places like Pakistan, Iran, China, India and Saudi Arabia? These places are a big chunk of the world's population, yet close to zero preaching. Pretty sure you can walk the streets in any of these places and ask random people if they every spoke to a JW, and the answer will always be no.
If this work was truly backed by God, then there should be no fear in openly preaching in these places. God would make sure that JWs will complete his work in safety.