F35 and F15 complement each other
https://www.google.com/amp/s/theaviationgeekclub.com/usaf-used-the-epawss-on-the-f-15-to-allow-the-f-35a-to-approach-closer-to-the-enemy-during-exercise-northern-edge/
And again, are you sure pushing US more will make them give us F35? Or ended up with not both?