FD
One could make a bigger case for more instrument training before the night qualification, because at night it is awfully easy to get conditions where there is no horizon, never mind real IMC.
In fact the whole "PPL nav syllabus" is a bit of a farce for night flying, because unless flying over a load of towns there is no way to navigate at night. After "offician night" maybe but not in a real night over open country.
Will your instructor allow you to go on your QXC when there is no horizon? Of course not. But the school is more than happy to take a few hundred quid off you for the night qualification.
But the training industry will always resist any change which would make the PPL look more expensive on their price list. And it's a fair point; the PPL is a "license to learn".
But paradoxes like this are able to continue only because most PPLs give up shortly after they get it, and those that continue to fly don't usually go anywhere near their license privileges. Can you imagine what would happen if PPLs routinely flew around the south east UK on dead reckoning?