AlNg:
In my personal opinion, marriage is more than satisfying concupiscence. It is about love between two people, man and woman, who obey the commandment of God to increase and multiply and to share their love with their children and extended family.
to seek our happiness from the creature is also called concupiscence, and that is not bad in itself. The one who marries seeks happiness through conjugal love, and family love, so he gets married to satisfy these both types of concupiscence.
It is true God said to Adam “it is not good for man to be alone …”, but it was a positive divine law in the context of before the fall, in the context of the redemption he said this:
“It is good for a man not to have sexual relations with a woman…” (1 Cor 7.1)