You become an JCAB ATPL pilot once you pass your Sim Check. After that you will still jump a few more hurdles before you are giving the blessing to operate on the line as a Captain, i.e. you will need to pass a JCAB administered Route check as well.
Pass/Fail rate is not the same as comparing how many starts a class and how many are left after the final route check.
Some quit, some are fired, other fail and a few skids through without any visible marks on their bodies :-)