Having a big stick to wave is always good...

Having an otherwise useless potential satellite-pincher does let you threaten the Russians/Chinese, true. You do get some gain from that but by developing a weapon (that's how they'll see it) that doesn't just destroy a satellite (it was there and now it's gone, that's the same as being destroyed) but allows its technology to be stolen (even worse), you make everyone nervous.

Nervous people are more likely to weaponise space which is another arms race that we'd do better to stay out of. To quote 'War Games', "Strange game, the only winning move is not to play"

Overall, you lose more than you gain, IMHO, particularly when you factor in the fact that the tech involved in the mini-spaceplane could be much more productively used in civilian/commerical reusable launch vehicles.