You can't. I couldn't get exited about Magic the Gathering no matter how much they spice it up, because I don't understand it.
Why not focus on giving a better product to chess fans rather than fail to try to appeal to people who have no interest?
You are precisely correct.
This thread reminds me of the many others, such as is chess a sport?...why isn't chess in the Olympics?...how do we get more people interested in chess?
Well, it is a kid's board game that is boring to the vast majority of people. It's akin to if someone wanted to get me interested in Cricket.
It's not "a kids' board game" at all. Very few "kids" develope an interest in it. As for cricket, far more "kids" are interested in that than chess. Nobody who does not understand cricket developes an interest in the game until he does gain some understanding. The same is true of rugby union.