Who knows. Maybe 10 was too short and 15 too long and a dozen was the sweet spot some focus group told them fear would make them hand over power to them. Because this is all about grabbing power and money as it always is.
Maybe they stopped at Dunkin Doughnuts and got a dozen doughnuts. Or maybe Beto and his old lady were watching that weird scifi movie ‘’12 Monkeys’’ and smoking some chronic bud and got like... like ..totally woke and like.. and said “Wow! 12 monkeys means like we only got like... 12 years left.. like..’’