it is not nessesery to be tall but it does help
against - could release herbicide resistance into wild strains, messing with genes in innately evil, people are scared, there could be unforeseen consequences. for- It's a good idea, less pesticides etc in the environment, more food, cheeper food, food in hostile environments, feed the hungry and the poor. climate change makes it nessesery. little chance something very bad will happen, benefits outweigh the costs.
By encouraging them in what they do. All dai, Everi day, Bng bng! also do not put them down, comfort them when they are sad, do not praise them for every small achievement because they notice when you are not treating them like every one else and try not to get to angry with then and don't be patronising. i know this because i had very low self esteem as a child.