If you’d like my personal experience:

My parents offered me money (if not much else), and always encouraged me to do new things. As a result, I did a lot of different things in my life, in fact, it’ll be hard for you to name any one “common” thing I haven’t done.

Now I play video games most of my time, and I have a lot of fun doing that. I enjoy cooking a good meal. I love looking at a sunset. All the different experiences I had led to me being able to enjoy the repetitive, same things. I don’t mind not doing many different things. I have no regrets.

So while I’m sure what you say can be true for some person, for me, it is definitely not. I’m not any more bored with the same old things than I was before doing everything. I’m very happy just doing few things, I don’t need a new thing every day to be happy. At the same time, if an opportunity presents itself, that I morally agree with, I don’t fear to take it, I don’t say “oh if I do this new thing the old things will be boring”, I just take the opportunity and later go back to the old thing, as happy as before.