It's a good thing I didn't say that then. I said you experience diminishing returns due to having already experienced similar (but not the same!) things. The more you experience, the more you recognize what you've already experienced in new experiences. This seems like a totally unavoidable consequence of living for anyone that doesn't have a long term memory disorder or an interdimensional portal gun.
You don’t have to take my word for it though, there are lots of older people who still find and get by on novelty in the world, are inspired by it, and don’t feel that everything is a rehash. There are some even replying in this thread, and more you can meet in your own neighbourhood I’m sure. Let them be an inspiration that it doesn’t have to end up that way.