Celeste has a deficiency of total persistency in the genes,not a need for pollination.
Yet some fig cultivars do produce ,Female and mule fruits at the same time in the main crop,and the need for pollination,,on the Female fruits might be the reason that they Fall out.
You see the fig tree reproduction is very complicated,with many type of flower,Female male,mule,perfect,etc.
Nobody ever sorted it to total clarity,because every cultivar is unique and different compared to another.
Celeste do not drop from lack of water or Heat.
If it will be the case ,then CECIL, Celeste that they harvested more than a thousand fruit last year,and this year under enormous heat and dryness in Texas, would have had aLL THE FRUITS DROPPED.
iT DID KEEP ALL THE FRUITS BECAUSE tHAT cELESTE IS A cELESTE WITH SUPERIOR GENETIC MAKE UP,and Totally persistent.
Of course not all Celeste in Existence are made from the same material,I could say most are not.