Maybe it is more of a cradle Catholic thing, to limit godparents to family members
I think for many it’s the outdated idea that the godparents will become guardians if anything happens to the parents. A good number of parents firmly believe this and it may have been true in the 1800s and early 1900s, but today we go to great lengths to explain that no, if they want the godparents to become guardians they had better get themselves a lawyer and a good will.
In our day, the world is small. Internet and free long distance have removed the barriers of distance. I would choose a godparent on the other side of the planet who is faithful and orthodox - who will pray for my child every day and give a holy example and solid advice over someone who is “fluffy” in their Catholicism and can come to the birthday parties.
So would I. Too bad I didn’t know then what I know now.