When I said "cute", I meant...well, what I said: in composition. When it comes to people's enjoyment of music, the subject matter or even the lyrics are secondary, even when it comes to modern songs. What matters most is the sound.
Maybe it's composed in a major key, so it just sounds 'happy'. Or maybe the rhythm is bouncy, or the syllables are arranged in a fun way. Or maybe (especially when it comes to folk songs) there are lots of open, sustained vowels that just make you sound good when you sing them. Those are the things that attract people to songs long before they realize what they're about.
And this is a little beside the point, but the point at which something is invented and the point at which it becomes ubiquitous are two different things. Computers were invented decades before they were even available for the average person to buy, let alone a staple in everyone's homes.