This simply isn’t the case. There are plenty of secrets that every military keeps just fine. See how long we’ve gone without anyone ripping off the F-22? That’s not even a new airframe anymore.

This is EXACTLY what I was talking about. The tech that makes the F-22 an unmitigated terror of the skies is of utmost importance, so it’s still kept secret. The barriers around that information are obnoxious, but effective. What blood type a subsection of your military has is of much less importance. That’s why that data was stolen (See: OPM hack) and our best weapons remain secret.