[kcb]

To add, the primary advantage that A2A missiles have over SAM systems is that the missiles dont have to fly up 10s of thousands of feet to hit their target. Modern "dogfighting" is about achieving optimal launch conditions(Altitude, speed, heading) for your missile against the target. So even if a Cessna could detect the F-35 and carry the most advanced A2A missiles it would still be thoroughly ineffective.

To create a drone capable of threatening an F-35 requires creating something very similarly capable in all ways but without the pilot. This may exist one day but it isn't going to come at a discount.