You can DO HDR but it DOES require different exposures...you can't cheat PS--I've tried...LOL. HDR pretty much requires a tripod and one doesn't always have a tripod. Also, sometimes there are moving objects, so that causes a problem getting the HDR sources.
But, there is a process where you can take the same pic and KINDA do the same thing...article, in fact, in this very month's Photoshop User mag (that I get).
A veteran is someone who, at one point in their life, wrote a blank check made payable to "The United States of America," for an amount of "up to and including my life."