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But at landing flaps, usually there is less lift. You want the induced drag, plus the flaps will make the center section of the wing stall first, keeping the wingtips flying and avoiding tip stalls.

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Right, that is why you want full flaps (per design of the particular wing type used) at slow speed dirty passes to prevent stalls. Obviously if you extend flaps past the point of this curve it's beyond the design parameters of that specific wing type. Why would anyone want to extend flaps beyond the design curve when the optimal point is at the center section (which is optimal lift at slow speed) you describe? When I said more flaps gives you more lift, what I meant is that full flaps correctly deployed at the levels designed for a the wing type give you the optimum amount of lift to prevent tip stalls. Not less flaps.

Andy