the kennel club are recommending it, not doing it. The tests can be taken by your vet and sent to the appropriate labs.
The results can then be submitted to the kennel club , for a fee yes. This then enables people interested in looking for an appropriate mate for their dog or a pup from this breeding to see the results thus choose whether suitable or not.
Certain hereditary diseases will only pass on if BOTH parents carry the gene so the kennel club database is a great help for health conscious breeders finding a suitable mate

: this applies to certain eye conditions so is very necessary if you have a breed known to carry faulty genes
I don't think much of some thing the kennel club do or don't do but this information IMO is vital in the
welfare of our dogs.
If you are considering using your goldie for breeding I think speak to your vet or the kennel club, who will know which tests are best for him/ her. The royal college ( vets ) and kennel club are currently liaising to establish standards for health testing in many breeds