Here is that an argument you are going to make please use a specific example and the detailed cases as much as possible to illustrate your argument as if you were going to convince your grandpa to take kayaking as a hobby since the neighbor with similar age has been taking the activity and has a transforming change in his life mentally and physically. You believe that old people should not take risks and participate in adventurous events as young people. Wrap the entire output in JSON format.
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