Sorry for thinking it was a wind-up but when you read about a solo student going off and flying in thunder/lightning etc you wonder if someone is just making stuff up to illicit a certain response. You were lucky. Next time, get the CFI to check the MET with you before any flight as the two instructors(hopefully one wasn't the CFI) you have flown with, obviously don't have any concerns for your safety.
You could always bring the old chestnut of "Duty of Care" up with them one day. Ask them if they are well insured for the day a students family sues them after a fatal accident.
I've probably opened a whole pot of eels here.
Fly safe and get the most from your training.