Basically a good point : In my strictly amateur opinion, getting acceptable audio is harder than getting acceptable video and relies heavily on the dark arts of compression and EQ. Say what you like about 'point and shoot' still/video cameras, but I don't think anybody has invented the 'point and shoot' microphone yet...
However, unless you're planning on hitting the ground running I'd
strongly recommend giving GarageBand a good college try before rushing out and getting a professional DAW: it is free, it has all the basics of compressor, EQ, reverb etc. - plus it can use AU plugins and there's an easy upgrade path to Logic Pro (GarageBand is basically Logic Lite) if you outgrow it.
Also, @
imac wannabe presumably has FCPX or equivalent for video editing, and that has copious audio effects.