Not quite. To get an IR you must have a night rating/qualification but if you hold an IR you are exempt from the currency requirements for night flight as long as the IR is current.
I should imagine that there are actually very few people who are actually exercising night privileges as a PPL due to the lack of airfields with suitable facilities. You also generally find that people have a great fear of lack of currency at night and more people tend therefore to seek Instruction hence why I think the accident stats are negligible?