Having said that, my reason for preferring firmware freedom mainly isn't principle; it's that non-free firmware potentially deprives me of control of my own equipment. By turning it's nose up at non-free firmware, Debian increases incentives for people to buy equipment that depends less on these blobs. That in turn incentivises manufacturers to offer equipment that doesn't depend on blobbiness.

I realise that these incentives are strictly at the margin; but Debian is the only leading distro that takes a hard line on these matters. If Debian were to retire from the battlefield, nobody would be left standing except the closed-firmware hardware makers. That would make me sad.

Actually, it only incentives people to buy and manufacturers to offer equipment which has the exact same blobs on a NAND chip on the equipment itself. It's more convenient, sure, since there's no need to find a copy of (the correct version of) the blob and load it together with the driver, but it still depends on these blobs.