Re: "myth" of hives making their own queen
You would need to replace a queen with an externally purchased one because this advice is coming from a company that makes money selling you that queen.
You can search up read and follow the advice of dozens of beekeepers that say you can make a walk away split that have not one cent to gain from it.
As for the quality factor. Here is what I understand about it.
Naturally a hive seldom experiences the sudden disappearance of their queen. The entire queen replacement system is not optimized for a sudden replacement of the queen. In both supercedure and swarming the bees had adequate time in which to rear a queen under optimum conditions. Emergency replacement of a queen does not necessarily reach that optimum condition.
Bees need a few days to gear up for making a queen. Or so that is what I have read about it. So rather than just splitting a hive and making the bees do the best they can. split them wait two days give them a fresh frame of eggs and they will do just as good a job rearing a queen as the supplier bought high tech super premium queen woudl be. SO is the supplier lying in how they are presenting the information? Not lying but not telling the whole story. I consider that deceptive at best. I would look for a new supplier and make my own queen as well.
Stand for what you believe, even if you stand alone.