Susan
What a stupid thing to say, you must have nothing left to learn to make such a comment.
Whatever the merits of taking these courses, it demonstrates that the person taking them is keen to learn the correct methods and skills needed to build a professional and successful business. some rugs are very prone to dye bleed and care should be taken when deciding what chemicals to use, we are working on peoples possessions sometimes they are irreplaceable and or very valuable, carpets in customers homes are one of the single biggest investments, gaining a little knowledge on working on them rather than learning from mistakes made in customers home is surely prudent, and that behaviour should be applauded, not ridiculed.
Richie
If its wool and you are concerned at all about colour fastness then i would use something like Prochem prespray gold, or maybe M Power and rinse with an acidic rinse.