I've noticed a huge difference in people who grew up with dogs from childhood (me) and those who didn't (OH and family). They really didn't have a clue, even with the soppiest Labradors. Gates open, biscuits on coffee tables, no training, no routine and so on. But mostly, no instinctive empathy. But people can learn, and must be open to adjusting in a big way. A show cocker? The grooming /grooming costs are a shock, the personality of the puppy is vital, I'm sure a novice would have sent mine back to the breeder after a month. A clever dog is a difficult one, and most cockers are little schemers.
I wonder if your friends may find a springer easier. Very lively , but more even temperament, and less thick coat. I have a springer as well as a show cocker, and agree wholehearted with a quote from someone on Col:
"You tell a springer to do something, but you have to ask a cocker to do it!!"