That's part of the story. The other half is that a Land Rover will fit the drive-in ramp of a CH47 Chinook helicopter, a HUMVEE is too wide to be carried aboard. For the same reason, the Army's Ranger battallions are going to the Landy as well.
Should American forces come to a bridgeless river, they come to a screeching halt. The Rangers, at least, may be able to get across with their vehicles; if regular Infantry units cross via Helo inserts, they do so as leg infantry without their vehicles.
And as for being accompanied by Strykers, forget it. They won't even fit in a C130, and only mount a .50 Browning MG.
It was just the way he told it, with a bunch of SOF guys all loaded up fer bear hauling A$$ across the sands in this luxury vehicle, AC and stereo blasting.....well it made a funny mental image.