It's not impossible (and I'd substitute "evolved" for "designed").

Yes, wanting "More" [time, money, love, status] is pretty firmly ingrained as an advantageous trait. But you can override your instincts (e.g. declining a drink when thirsty, if you learn the glass of water contains poison). And it is possible to learn to want what you already have.

How? Practice three things: Compassion, Attention, and Gratitude. (Pick any two, and the third will follow almost automatically.)

That's the central thesis of an excellent book, "How to Want What You Have" by Dr Timothy Miller. It changed my life.