That's why a lot of those developers don't like developing backup loaders. Though the argument is usually if you own the game in one format, it should be fine to transfer it into a different format (this is the big argument the law hasn't seen fit to address, beyond mp3s, but from that ruling many infer its morally fine).
As far as homebrew goes, reasons are wide and varied. But generally it's to allow access to the hardware you legally own that's been locked away behind software for arbitrary reasons. And done for the community, it's done for the community. To take that work and put it behind a pay-wall without attribution or permission is a bit of a middle finger to the community. Which is why the community tends to not like it. And I agree, if you don't own a game and pirate it, and then complain about other people doing very similar things, it's a bit much. But take the fact there's no permission or attribution, and add the fact they're making a profit off people's work which is given freely, and that's pretty obviously a huge issue.
But back on topic, this seems to be a completely of-their-own-making, so I see no reason not to support this all the way
Just hopefully it won't be terribly difficult to solder on.