That would have been one case where 'eminent domain' would have been a good solution.
It's a real pity to see such an iconic building go to waste. The demolition story tries to spin it hard as though the family had no other option, but of course they did: if they were unable to be good stewards of the property then they could have donated it to the Belgian state.
But after looting it for anything valuable it is of course much better to have a white-wash story out there about how those urban explorers violated the privacy of the owners (never mind the fact that it had been abandoned for years and that there was plenty of damage from neglect alone).
Some photos of the castle: https://www.davidbakerphotography.com/location-history/resid... (see in particular one near the bottom)
About the demolition: https://www.byronhartshorn.com/2017/05/31/chateau-de-noisy-i...