Short answer is different roles. F22 is specifically an air superiority platform, which is why only the Air Force has it. F35 is a multi role platform and a lot of its value comes from its ability to communicate with the infra surround its roles.
The F35 is also meant to be very flexible, so that we can slap new toys into it as the world turns. It's supposed to run it's own little "fleet" of networked drones and MALDs and similar so that it can grab all the intel of everything about the enemy and send that info back to a bunch of A-10s and/or B52s carrying long range munitions to actually fire.
