This right here is a problem IMO. I understand the thought so the good Dr. need not respond as this has already been discussed along with Thursday shipping for Friday delivery.
Problem is many people run a single tank and often 2 of the same fish can not be placed in the same tank. What happens if they both arrive healthy? I suppose a LFS might take it but what if someone doesn't have a LFS? Do they set up a new tank for one fish or flush it? It sounds good and generous but I think it's done because it's easier and cheaper to ship an extra than having to honor the doa policy.