I mean it's hardly like they're worried. They might struggle to sell at their current ridiculous prices, but the worst case scenario is that they sell them for on a bit more than what they bought 'em for. I suppose they do have the sunk costs of their expensive bots though.
It's incredibly difficult to actually estimate what proportion of consoles actually went to scalpers. Or indeed what proportion of "scalpers" are actually opportunists who wanted the console to begin with, but saw big prices and decided to sell on.
One interesting corollary of the existence of scalpers is that lots of gaming technology launches at too low a price. It would actually be more efficient if manufacturers priced their new electronics high enough so that at launch they don't have such excess demand.