Why landing was the Seafire's greater Iwo Jima danger

How effective were Seafires against Zeros over Iwo Jima?

They were effective in the air, especially with radar direction, but their fragile landing gear made carrier recovery a serious hazard.

The Seafire was effective against Zeros around Iwo Jima. Radar direction helped put the fighters in position, and the aircraft remained fast, nimble, and well armed in the air. The more immediate danger was returning aboard because the Seafire's undercarriage could buckle during landing. The comparison highlights how naval fighter effectiveness includes the repeated punishment of carrier recovery as well as air-to-air performance.