Setups of course can and should be tailored to the way you fish and bait you use. I use drag so tight you can barely pull it. Line with little stretch, braid mainline but with a mono shock leader. Ive seen guys fishing with me, use smaller bait, medium size bluegills for example, that had limp setups, lighter drags etc. catch smaller mid twenty inch catfish with the bluegills half swallowed head first, lodged in their throats, with the hook still in the bluegills upper tail and never even touched the catfish. Swap out a larger hook and a big sucker onto their setup as is, and their whizzin' into the wind. I see no benefit to using light drag, or even medium in flathead fishing basically ever, unless someone wants to use light line, smaller bait and gear for smaller fish. Aside from hookups, the more you allow a big flat to run, the better odds he gets off or breaks off.