Irresponsible? Yes. Avoidable? Maybe not.

Dad never wanted to have a hypo. It was just because he was out there doing something and got distracted from monitoring his bloody sugar. It sneaks up on you so you don’t notice until it hits you all at once.

This is why (in his later years) my mum was forced to be a part-time, on-call carer. Dad would have it under control, until he didn’t.

Having a blood sugar reaction is analogous to the guy that goes to the pub to drink one beer and drive home an hour later, but his mate buys him a beer, his other mate buys him a beer and the next thing he knows, he should be getting a taxi. The problem is that the diabetic can’t keep track of how many empty beer glasses there are.