... but does that choice/lack of choice even matter?
It does, if you play D&D as "the character builder game". And don't get me wrong - a lot of people really enjoy character building. If you have fun this way, good for you!
But ultimately, D&D is not a character building game. It's a roleplaying game. It's a bit like the person in a photography group who cares more about cameras - the lenses, the lighting equipment, the sensors, all the technical details - than you know, photography. They take photos sure, but it's more to test/prove/show off their camera and equipment than to create a beautiful/interesting image.
Martials not having any choices after level 3 is completely false. Every round you have a decision to make! Do you attack the goblins or attempts to hide? Or do you try to parlay? etc etc. It's only in the character building phase where this lack of choice exists, not in play. (and even this is not completely true anyway - feats/ASI for example).