Why are older people less adventurous?

My coworkers and I were talking about what our plans were for Memorial Day. All my older coworkers had no plans Ans quite honestly didn’t want to have any plans. Most just want to do nothing and stay home with their kids. One of them was invited to a barbecue but didn’t even want to go

meanwhile young coworkers in 20s are all thinking about vacation trips , six flags, sleepovers , road trips. We were all happy we get to have fun. Meanwhile all the older people just didn’t really want to do anything at all.
Why are older people less adventurous?
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