...“Frequently repositioning forces across a base cluster could induce an enemy to dilute its strike salvos over a larger area and possibly waste weapons on false targets,” Mark Gunzinger and Bryan Clark wrote in a May report for the Center for Strategic and Budgetary Assessments, a national security think thank.
Dispersing aircraft also makes it more difficult for an attacker to assess damage after a strike. With lots of targets in a lot of different places, you need more sensors, eyeballs and aircraft to determine whether follow-up attacks are necessary...