Dunno, maybe the phase of the moon and position of the stars caused chemical changes in the brains of siaolangs?
Or maybe just maybe, everyday have, just that it's not as newsworthy. And when 2 or more such news comes close together, we naturally feel how come so often nowadays.
It's like you never make any major mistakes at work for 5 years. Then in the last 1 week, you made 2 huge mistakes. Suddenly boss will scold you for making so many mistakes. However, you will probably feel indignant.
"Boss, how can say like that, I worked past 5 years all the while no mistakes, I make 2 mistakes and you make it sound like I make mistakes all the time."
Boss: "You also got make mistakes over the past 5 years, only that these were not as critical, so I never scold you."
Also, we always say "how come Yishun got siaolang again". Well, Yishun is a small part of Singapore, China is 13,000 times the size of Singapore, imagine a country with 13,000 Yishuns...I am surprised we dun see more reports of siaolangs.