Probes are mostly a waste too, they sent Magellan to Venus for study. The argument I heard at the time from the weenies at JPL was we wanted to find out why Venus had a runaway greenhouse effect so we could prevent the same thing from happening here.
We didn't need to send a probe for that, Venus is upside down, not rotating much at all, and ~ no magnetic field to deflect solar radiation. JPL knew all that and they still sold that waste of money to us with lies.

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