That's not how it looks like to me, it looks more like the very act of selecting Odyssey from the launcher will lock out VR compatibility. It's not "the on-foot sections of Odyssey are VR-incompatible", it's "Odyssey will not be VR-compatible". This means that buying Odyssey as it currently stands is pointless for VR owners, as it is forcing them to choose between Odyssey and the VR setups.
Hopefully, FD will do the responsible thing and include all non-foot content from New Era in the base game and/or Horizons, making it so that VR users only miss out on the space legs stuff but still get to enjoy the extra ship-side stuff they implement. It would be a scummy cash-grab of epic proportions to force VR players into buying a full expansion to get access to a very limited feature set. There's also the point that one thing that people disliked about the seasons model was that they had to pay for content they didn't like or will never use, so it seems a bit odd that they would force users to buy into a first person shooter spinoff to get ship stuff.
Alternatively, if they are worried about the business side of things, I'd probably be okay if they released a small paid-for DLC to include the extra ship side stuff if it were released at an appropriate price; a "VR special", so to speak. If the full expansion costs £30, then sell the "VR special" for £3-£5 that only includes the VR supported content (the ship-side and SRV stuff). I'm sure there's probably also a lot of users that don't particularly want space legs but would be happy to chip in a few quid for some extra features on the core game that would be interested in a discounted and stripped down version of the expansion that excludes the Elite-Feet content.