I interpret this as that SpaceX has a high margin between market prices and their internal costs, so they can safely reduce prices when needed while remaining profitable. The competitor of course should aim not to the current prices, but to SpaceX's costs to be able to compete on the market.
I probably over summarized. I think there’s still room to undercut or compete (particularly on specialty projects) until SpaceX hits 10x for sure, and maybe as high as 15x.