"High carbon" does not mean high quality. it simply refers to being over a certain percentage of carbon in the steel when the steel was made. I don't recall seeing anywhere on that page what type of steel the blade was made out of, which should be a red flag for you in the future.

If the blade is of lesser quality steel and can't hold an edge it won't matter who hones it, it will still be a poor quality blade when you get it back. If you are thinking of getting into honing in the future it may be worth your time to invest in some decent wet stones and try putting an edge on it yourself, just for fun and as the name states: practice.