I think you are being a bit hard on yourself. It's true that bass is easy in a sense - as you say, four strings, one note at a time is enough, but bear in mind a couple of things: it's possible to 'get by' on bass, even be in a band and hold the rhythm section together, just by learning the rudiments. But as others have pointed out here, many players have taken bass playing to a whole other level. I think you're confusing the fact that you can get away with a modest ability with a belief, therefore, that bass is an easy instrument, full stop.
The other important thing to remember is Feel. Why do some bass players sound ok and others sound amazing, even though they are playing the same thing? It's arguably the most important aspect of bass playing - because if you can groove, you don't need to be fast or fancy - and many players would do well to focus on this as their main effort to improve rather than trying to fit more notes in..! I hope you continue to enjoy your instrument for many more years to come.
The other important thing to remember is Feel. Why do some bass players sound ok and others sound amazing, even though they are playing the same thing? It's arguably the most important aspect of bass playing - because if you can groove, you don't need to be fast or fancy - and many players would do well to focus on this as their main effort to improve rather than trying to fit more notes in..! I hope you continue to enjoy your instrument for many more years to come.
