I was trying to use language carefully. When I think of something that necessarily exists, I have in mind such Platonic concepts as "the lowest prime number", which I accept do necessarily exist, but say zilch about how we should conduct ourselves towards our fellow humans.

There is, however, a curious intellectual tendency to think there is something divine about such abstract mathematical ideas, which probably goes back beyond the locus classicus, Plato

It was also there in the Middle Ages, with the development of the ontological argument for the existence of God, had a passing appeal for Bertrand Russell, and an enduring one for Kurt Gödel

So it's not too surprising to see such thinking turning up on a local Forum such as this.