There are scuba deaths every year. This year is no different. I don't see how either of your examples would provoke a dive operation to demand that divers have recent experience:
I think that divers dying is a perfect reason why some operators are becoming more cautious and frankly it's about time! Perhaps the amount of 'close calls' that we read about in the forums are also starting to resonate with operators in the area.
Keeping a notebook of your diving experience is simple. If you do not have a logbook, or any proof of being an active diver, or you haven't dived in an elapsed time, a simple demonstration that you can perform the minimum skills expected of a safe and conscientious diver is not much to ask.