Everything you wrote is true, and I endorse it 100%, but there is a typo that definitely changes the meaning of your comment. The primary purpose of flossing is to remove plaque, not the plague.
That said, flossing will ultimately result in a healthier oral microbiome and thus can prevent future illness, so preventing plague is technically still possible.
I also love the world building, but I think I approach it from a different direction. Rather than prepping sessions, I like to build mechanics and details into the world. These are often informed by the actions of my players, but in the game it allows me to run a similar “zero-prep” style because the world already exists. Especially after several campaigns in the same world, when so much has been generated over hours of play.
The experience of seeing my world unfold before me, and seeing the wonder and emotion on my player’s faces, brings me so much genuine joy. I feel like I did when I was a kid.
I enjoy helping others experience the first time wonder of discovery, even after years of playing. It’s why I play in a custom setting and regularly create new monsters, spells, subclasses, and magic items. So many people crave that moment of first contact, and I love to help them find it.
On the DM side of that, when there are new things for the players to find, I get to stretch the creative muscles that I thought I had lost for years. I get to challenge myself to create new, interesting, and balanced experience to offer up for my table.