17. We "can't even get this aircraft into actual use" because it has almost no use
It's got problems, but that's not why it's unused in combat - it's because there's no mission for it. Were we in a shooting war against anyone with modern fighter planes the F-22 would be used without hesitation and, I'm confident, to great effect. (Just because a plane is not as safe as it should be for peacetime flying doesn't mean it's not effective in combat!)
But the wars we're fighting now don't demand air-to-air combat, and nothing would be more wasteful than trying to use an F-22 in a ground attack role. So our pilots fly it to gain and maintain proficiency and send a message that we're willing to sink more money into defense than we really need to.