My grandfather bred cockers but I have no desire to do so.
You have to be able to deal with every possibility to do it properly (no pups, death of the mother, illness, rehoming, taking back pups that haven't worked out in their new home, etc.). Those that breed just one litter don't always do it for the right reasons (don't want anyone jumping on my back for this one) as the reasons for doing so aren't often in the best interests for the breed. Its OK saying but someone's got to start somewhere but if they start with e.g. cuteness or she's a lovely dog then that's hardly the basis to breed. I believe that if someone does this they do it seriously and not half-heartedly.
There's an ad in my local free paper from someone desparate to find a stud dog for their cocker, which says it all.