It is not about time, but about approach. Has Nafuya for years blocked people's passage? Once they go there, once they systematically dig out the bushes, it means they are so comfortable. Why not make a path? Trails are for them to walk, so why not do them where people are walking?
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You need to create people the maximum of small inconveniences, then they will not have time and energy to deal with big problems. Sometimes, you can remove some small inconvenience and show people how they are cared for, but immediately create at least a couple of others.