I mostly agree (and I'm sure you're right they're trying to make more money so that will probably ensure that it stays on Thursday). And it's true that we can always wait till craft until craft day regardless, but there are two main concerns as I see them.
Most people are working on Thursdays. Most players also have family and other responsibilities, so sometimes you are lucky to finish your dailies let alone craft. Of course of a lot of people work on Sundays but if you're talking majority then most players have more time on Sunday.
Plus we already are pressured into annoying hoarding for so many reasons, and now this just another thing that you have to delay. I know that some players like the hoarding aspect, but most players do not want to have a bunch of unopened mail, red dots, uncrafted gear, saved expo runs, saved contest and boss pit prizes, and other stuff just waiting for certain days to do them. It's nicer to be free to play the game each day without the pressure of losing resources. It's also a lot nicer to be able to farm and craft right away to see your progress. There is enough waiting in this game without the Thursday crafting.