Stingers would provide no protection against a competently managed and equipped air force. If we were fighting the Russians in Ukraine, we would be using JADAMs

Stingers would provide no protection against a competently managed and equipped air force. If we were fighting the Russians in Ukraine, we would be using JADAMs etc from well outside the engagement envelope of any MANPAD. The only way to achieve air superiority is with a fighter aircraft and its associated support aircraft. You can deny air superiority with a full spectrum AD program (which a MANPAD is but a small part), but you can not impose it.