I'm sorry, does the government force United to have 50+ departures in a 15 minute period or did they do that to themselves?
Everytime SFO would shut down a runway for several weeks/months, they would tell the airlines WELL in advance, "Hey, we are shutting down a runway, our arrival rate will be down to X per hour. Please adjust your schedule to allow for a realistic arrival rate". The airlines would quite literally say, "What? Cut back 5 out of 25 flights on SFO-LAX so that AA/UA/DL/WN can add more and steal our money? Fat chance". Then we'd have 1-3 hour GDPs for weeks on nice sunny days and the airlines would berate the airport publicly to the passengers.
I am guessing this is the same old crap.