Drones won't work for stealth because you need the radio-wave link. F35 is better because the pilot can turn off all communications when doing the SAED mission

Drones won't work for stealth because you need the radio-wave link. F35 is better because the pilot can turn off all communications when doing the SAED mission, forcing the enemy RADAR to increase their power to even try to see the F35. I don't think drones are in a position (yet) to go radio-silent and accomplish their mission.