There is probably more to the news story than has been reported.
I think this is the crux of the matter. In any normal tenancy, there is a bond of 4 weeks rental. If someone dies, then the executor of the estate would take steps to remove the belongings & return the home to the landlord for re-let. This should take no more than 4 weeks, so the bond would cover this. It could take less, & then the estate could even get a small refund, depending on the sympathies of the landlord.
For there to be all this commotion, there must be more to this story. Maybe the landlord didn't have a bond. Maybe the tenant was a bad tenant & owed rent that the bond didn't cover. Maybe the tenant damaged the property. Maybe the executor was slack & didn't clear the belongings.
With the exception of the landlord not having a bond (his own silly fault IMHO), the landlord has every right to pursue the matter. He has a property that cannot be rented until it is back in his posession in a good condition. It is not his fault if the tenant was in arrears/caused damages/executor didn't clear the place etc.