No that is not what was being said. He was saying a place where people can list what they are breeding for and that would inform people on what not to breed if someone was already breeding it.I think you misunderstood what he said. I believe he meant that it could be a place where we post what we are are breeding for, so that if someone is interested in trading for one they can contact the one who posted. And I think it could be useful, and is probably needed at this point, because at this stage in the generation, we are no where near to having RNG abuse, so having a place where people can go and trade their flawless breds for other breds would be very useful.
Doing such actually limits trading. Because one person might not like what you have to offer and refuses to trade you if only 1-2 people bred a particular poke and refused your trade you are S.O.L. And have to breed it yourself but you may find someone else with the exact same poke you need that IS willing to accept your offer, or finds something you have that they need.