[Kansas58]

Actually, this is not much different from the “rules” and “agreements” made between two Catholics, getting married.
Yes, I need “permission” from a Priest, to perform the service, to a point.
Actually, marriage is between husband and wife, and the Priest only OBSERVES!
In fact, you can have a valid CATHOLIC wedding if a Priest simply attends, and does not perform the service.
I do not disagree with what you have posted.
As a practical matter, however, it is not much of a barrier at all.

[A.A. Cunningham]

Do you acknowledge that your earlier assertion was incorrect?

[GCC Catholic]

The dispensation for a Catholic to marry another baptized Christian actually IS fairly straightforward to obtain - particularly in the US, where Catholic/Protestant marriages are fairly standard fare.

In fact, you can have a valid CATHOLIC wedding if a Priest simply attends, and does not perform the service.

Provided the proper dispensations are gained, it is actually even possible for a marriage conducted by a Protestant minister, with no Catholic priest in attendance to be valid. That said, the Catholic Church's preference would be for the wedding to be officiated by a Catholic Priest in a Catholic church.