How does Cato's exclamation about Carthage convey the Romans' fear of their enemy?

Cato the Elder's famous line "Furthermore, I consider that Carthage must be destroyed" (Ceterum autem censeo Carthaginem esse delendam) was used in his speech that pushed for an attack on Carthage.

This was the result of his visit to Carthage during which Cato witness the wealth and prosperity of Carthage. This awoke the hear the goods will be used for the attack on the Romans, thus Cato called for the war first.

The line tells us about Cato's fear of Carthage's wealth and possible advantage they might have with the preparations for the war. This is why Cato exclaims the need for destruction of Carthage before they attack first, to claim the advantage and dominance over the enemy that is seen as potentially dangerous.