Except space hasn't been "more secure" for nation states against other nation states in decades. US, Russia, and China all have various capabilities to destroy or steal or manipulate or tamper with satellites. It mostly doesn't happen right now because nobody is at full blown war. Shooting down satellites was expected to be a part of any superpower war since the 80s. Those weapons will be plenty effective against even massive installations in space.

Meanwhile, space gets you zero protection from the infosec threats that plague national security installations.