Would there be an explosion if Lin and Donald Glover touched?
I'll grant that it is not needed, though, if you will grant that we don't need penguin feet.
Mind you, I could stand to have us kill fewer strangers and spend more money on ourselves, and I love the space program, but don't just squawk about your own individual enthusiasms. Join with others who want to reduce defense spending, increase taxes etc... If they win, you win.
Not that either one couldn't be fun. One just explores a more plausible world than does the other.
The easiest thing to cause a huge change would, to me, be the survival and procreation of almost anyone who "should" have died or the death of anyone who passed their genes along in the real world. If one New Yorker 300 years ago either had kids when they didn't in our timeline or failed to have kids when they did in our timeline, then almost every native New Yorker would be a different person than the ones we see today. Now push that timeline back to ancient Greece, and basically everyone in the whole world, excepting geographically isolated groups, is a different person than the ones who are now alive.
To put it another way: Go back 1300 years or so and kill some European peasant, any peasant whose genes survived, and absolutely nobody of European descent who is alive today will be the same person who is there now. Now do it in the time of Confucius, and nobody in the world, except for those isolated by geography for millenia, will be the same person. Not only will there be a few different genes floating around, but the history of our sperm and egg combinations will be completely changed, so that the sperm and egg that made Robert E. Lee never existed, let alone produced the same guy.