Science Fiction and Space Battles

Something I never understand between various science fiction movies and series is the difference in how space battles are conducted. Take for example Star Trek, you see all kinds of ships in fights, but contrast this to Battlestar Galactica, Space: Above and Beyond or Star Wars and there's one striking difference: the absence of fighter and bomber ships fighting alongside capital ships. In Star Trek you will see, for example, the Enterprise in direct battle with various other ships, but aside from some shuttles they have no fighter ships or otherwise. In Star Wars next to the Imperial Star Destroyers, Corellian Corvettes and Dreadnaughts, Mon Calamari cruisers, and Nebulon-B frigates you have a multitude of TIE fighters, TIE interceptors, TIE bombers, X-Wings, Y-Wings, A-Wings, B-Wings, and YT-1300 like the Millennium Falcon. Battlestar Galactica had its Vipers and other ships. I wonder what this, in my opinion, fundamental difference signifies and where it comes from.