Which do you think is easy on the marketer? What do marketers have to overcome when marketing services?
It's definitely more difficult to market services because they are never the same. If two consumers go to the same massage therapist for the same "type" of massage, it wont be exactly the same. Services are more subjective to the consumer purchasing them. What one person considers a great service, might be considered only fair by another consumer.
Products, on the other hand, have continuity. You can expect exactly the same thing from the exact same product, each and every time it is purchased.