I don't know about us in particular being a bunch of weenies, but us as a generation, sure. I agree, however, that laziness probably did not drive the initial change, though it certainly has prevented much of a "regression." When your only choice is electric or disposable, it's pretty hard to choose anything else. When you make electricity's availability questionable, then you really only have one choice left.

On the OIF packing list for I MEF, 1 razor with (10) or more blades is still listed as a mandatory item. Even if you shave with an electric in the field (as I do, my norelco lasts almost a month on a charge, haven't had it die on me yet), you're required to lug around the stupid disposables. Really, the disposable razor companies could not achieve better product placement.