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I hear what you're saying but it's very easy to miss these things within even 100-200m (even though they are generally very large systems), the fact they hit mineralisation in holes so far apart to me is a big positive. Look at the discovery of Carrapateena below, you've drilled a hole with essentially barren rock, stepped out a few hundred meters and drilled an absolute stonking hole into the deposit:
Now look at the discovery of Prominent Hill - same thing, they missed by a few hundred meters:
Compare this to Emmie Bluff Deeps, the previous drill holes were much wider apart YET they hit significant mineralisation in the holes to the east (as in wide, low grade copper mineralisation). There is A LOT of space there to fit a sizeable deposit, they almost certainly haven't hit the best stuff yet and are on the periphery IMO. There should be a higher grade, sub-vertical breccia core or feeder structure:
