This is really just a practical thing.
Obviously, there are cases where, without question, the answer is just bad and should be deleted. In the cases linked, they are eloquent, to some degree sourced. But I, personally, share the sentiment that they are not really answering the question, they only contemplate about related things.
These posts show some insight and may be of value for some users, but the votes do not reflect this hypothetical possibility and users looking for these pieces of information will have trouble to find it via search.
The question is: How should the moderators proceed in cases like this?