I think this all depends on subjective definitions. I don't think human beings need a huge force like love or lust to commit stupid acts, I think it's just in our natures to do so and then seek out excuses for them.

Also, it depends on your definition of stupid. I know most my family would have secretly thought I was doing a pretty stupid thing by getting married at 20 and moving to the other side of the planet to a country where I had no one but my husband and didn't speak the language at all, but it turned out to be the best thing I could have possibly done. So according to them, love caused me to do something stupid. To me, love was the motivator for me doing a beautiful thing.