The reason we made Dragon Quest 9 on Nintendo DS was to allow quick and easy play over local networks. At that time there were not many games using local networks and it was difficult to do so. But with Nintendo DS, the moment you turn the power on you can connect with people. We thought that was an amazing system, and decided we wanted to make Dragon Quest 9 using that ability.
But I don’t want to play my JRPGs with other people, and also don’t want to buy a little handheld console to play one.
I agree, and I think a lot of other people did too! (Although I did eventually play it via emulation and I thought it was decent.)