They do? Let me check
Edit : Yes they do have
The F-15C Block 50 does not have an AESA radar.
AIM-120Cs not being available for random battles [or others] is not a factor of realism.
What real life militaries do is history, not realism.
AIM-9s are on the correct pylons in-game. The F-16s very much were designed to use 6 AAMs, contrary to your weird claim.
Newer pylons =/= exclusion of older pylons.
Pylon choice is 100% visual in-game, and the ones in-game are currently accurate pylons to what is compatible with F-16s.