They might, if they had a national registry of grip strength. Until then I suppose they'll stick with using the nearest proxy.

Why would they use it at all? Women have been US military soldiers for a long time. Every one of them could have had their grip strength, body strength, etc. measure - if those additional details were predictive of anything useful.

But why? Do drone controllers require massive amounts of grip? The keys for the transport coordinator keyboards require 20 pounds of pressure?

Few things in the military require brute strength. And those women who have that strength shouldn't be rejected simply because they are women.