Out of Curiosity, what are some canon confirmed things that I or You as a "Muggle" might want from a magic person? This is on a personal level.
Now, I love Hagrid to death, I really do, but I kind of see this as a big part of the problem intrinsic to wizardkind. They view themselves, and what they do, as so superior to everything else that they can't understand why someone might not want to use magic to solve a problem. I, on the other hand, can think of plenty of reasons why technology might be a better solution problems than magic.
What are some canon confirmed abilities that a government or a military might want magic for? This is on a political, geographical level.
Magic on the whole, though, isn't really that awesome a thing for a military, if only because it takes decades of practice to get really badass at combat magic. It's way easier to train a soldier to be deadly with a gun than it is to train one to be deadly with a wand. If wizards did exist, they would likely comprise elite commando units that are explicitly magical, or possibly provide magical muscle to larger numbers of mundane soldiers, lending a wand to support the guns.
And the only possible ways to resist it all require the guy to have specialized magic training
It's also why all the Azakban!Harry fics that have Harry be 'immune' to Veriterisum and thus they don't give it to him even though he requests it are freaking retarded. In canon!HP, Harry's request would be denied by default, because anybody who is requesting Veriteriserum would, by definition, be forewarned to fight it if necessary, and thus be perfectly capable of lying under it. Ergo, they couldn't do it to him. He would see it coming, because he freaking asked for it.
What are some canon confirmed magics that the world might benefit from? This is on a global level.
So right off the bat, before we're even into what diseases it might or might not be able to cure, or any of that mess, we've made the world undeniably a better, cleaner, healthier place that is firmly one step towards a utopia. No one will ever have to starve ever again, and no one will ever die of a waterborne disease in a third world country, either. Infinite food and infinite clean water are things now. Just stop and think about how man fucking problems that solves. Just that alone.
The wizards as a whole really are bastards. I'm serious. Can't be bothered my ass. Fuck you, wizards. Fuck. You.