Yeah. I was going to say something in the earlier post about postponing Eucharist for the same reason. There's that whole bringing judgement on yourself thing from 1 Cor 11. Yikes!
The Baltimore Catechism goes on to say:
Persons of an age to learn should know the chief mysteries of faith and the duties of a Christian, and be instructed in the nature and effects of this Sacrament.
I think we can say that a young child has the ability to "profess our faith as a strong and perfect Christian" in accord with their intellect and their station in life.
Personally, I wasn't very clear at age 13 about what was really going on at Confirmation; but, something definitely happened. Maybe it took several decades to manifest but it happened.
I agree with what you've posted ... it just "feels" funny!
I also agree with another post which pointed out that the current system in most dioceses deprives teenagers of the sacramental graces of Confirmation at a time in life when they really need it.