Agreed.
But IDK. I would think some reporters would have reported if they had fished things out of the ocean, or if they had definitively seen things from the plane in the ocean, like seats or something of the sort.
I think they're pretty certain they've found some wreckage and that's exactly what they want to avoid - it being released by a journo on a plane/ship rather than an official statement. The satellite data and modelling gives them enough to go on to make the announcement with certainty before they retrieve the debris JMO