> Would we not learn a lot more by landing on these moons? Probably, but it's also a lot harder. Not only does it require more delta-V, you now need to design,

> Would we not learn a lot more by landing on these moons? Probably, but it's also a lot harder. Not only does it require more delta-V, you now need to design, build and test a lander in addition to a spacecraft, and you need to build everything to be able to operate in Jupiter's harsh radiation environment (Europa Clipper will only do fly-bys of Europa and spend most of its orbit further away from the high radiation environment).