Honestly I'm not very bothered. I struggle to see this as false advertising when they're declaring on public forums that physical copies will not include a disc, and it's quite likely that those physical copies will also state on them that it includes a code and not a disc.

Given our increasing environmental concerns the idea that hundreds of thousands, if not millions, of discs are not going to be produced for this is a good thing, I think. I imagine the only reason a physical version exists at all is to ensure the game has a presence in physical stores, so large advertisements can catch people's eye, so stores can do related promotions. In essence, all those empty boxes will be produced purely for advertising purposes, otherwise I imagine they would scrap physical copies all together to save the related production, transportation, and logistics costs.