Why am I not interested in bird watching, knitting, or NASCAR races? Because I'm not.
"Let's play make believe" is just not going to sell well to most people. Not even most kids, beyond very early years.
Mileage is what it is.I found this to be totally untrue. There were many reasons, but this one I have hardly encountered.
As surprising as it is for me every time it happens, I will admit to running across many people who just don't have an interest. They have their hobbies, they like their hobbies, they have no interest (aside from humoring me in some cases) of getting into my hobby.Think of any hobby you don't like. That's the same question an aficionado of that hobby asks when others don't want to join him.
Why am I not interested in bird watching, knitting, or NASCAR races? Because I'm not.
Are there things that can be done to intrigue me into participating in them? Probably, but they aren't likely to be sustainable, good for the hobby as a whole, and almost certainly will affect the enjoyment of those who currently enjoy those activities.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.