They seem to fail 50% of the Direct entry captains
You keep quoting this number, Armani, but what evidence do you have that this is correct, because it is certainly at odds with what I have observed?
Very few pilots have joined as DECs in the last few years, especially since they required a JCAB ATPL. I haven't followed the progress of those in great detail and it may well be that a proportion did not get through but when we had DECs without a JCAB ATPL then nothing like 50% failed, in fact I'd be surprised if it was even 10%.
I'm not suggesting that people don't look carefully at all aspects of the job before leaping but stop trying to scaremonger with blatantly false information.