You never use a drive-thru window?
American businesses figured out that they could sell more product more rapidly, and thus increase their profit margins, by using drive-thrus. If you enjoy standing around by a McDonald's counter for 10 minutes, knock yourself out. I would much rather get my food quickly and go on about my business. It's got nothing to do with "American laziness."
Why is a drive-through faster than a counter?
I prefer to call it “liberal laziness” myself. Drive-throughs apparently emerged sometime in the 1930s, a time when liberalism was on the rise in response to the Great Depression.
I grew up with all the fast food restaurants being walk-up places anyhow; the only time I use the drive-through is during lunchtimes at work when I’m pressed for time, otherwise I prefer to still walk in.