To strengthen our fear of Jehovah, we need to focus on pleasing him in every decision we make. (Ps. 16:8) As you read Bible accounts, ask yourself, ‘If I had been in that situation, what decision would I have made?’ For example, picture yourself listening as the ten Israelite chieftains gave their negative report. Would you have believed the report and given in to the fear of man, or would your love for Jehovah and your desire to please him have won out? An entire generation of Israelites failed to recognize the truth that Joshua and Caleb spoke. As a result, they lost the opportunity to enter the Promised Land.​—Num. 14:10, 22, 23.
The issue is though Joshua and Caleb never changed their viewpoint or meaning nor did they say that they were not inspired and can make errors in their reports.
The GB did so you cannot levy the same trust to the GB as Joshua and Caleb.