I agree that it isn't -that- difficult to travel, but I also assume you're from a 1st world country.

For those of us in the 3rd world (Uruguay in my case), it's not "really easy" - it represents possibly a year or several years worth of earnings, plus a lot of diplomatic hassles (haven't been able to visit the US yet because of visa requirements, for example), and the fear of being turned back at the border after all that.

For many people in my country, traveling (possibly on the wedding trip) is the high point in their lives.