Not sure what you mean Westy...if i had a suitable class 2 luminaire then a cpc wouldn't be needed. A 2 core cable serving it would be fine, but not future proof. I'd rather cable for what might be, rather than what is...so cpc at each lighting point, which is now the norm...
and if the cpc isn't required, at least it is there for future use. OK, a "floating" cpc isn't ideal, but connected in a Wago or Ideal it's not exactly going to kill anyone is it?
Oh...look. we have a fault on the lighting circuit...the mcb has tripped!
No! It's worse...the rcd has tripped... or the rcbo...
I know! Let's open up the Wagos that have the cpc connectivity and lick the bare ends!
Westy, we looked at a poor connector...but we both know there are various ways of sorting that out...I totally agree with your scenario of perfection, but in the real world I do feel there is room for variation, provided you can justify it...that's all I'm saying. In a previous life, I argued black was white...and sometimes it was.
Having said all that...
We all should strive to do what is best, and if that's not possible, do what is as near to best as we can manage.
and if that's not possible?
Bodge it!
,,,but bodge it safely!
It's what we have to do...sometimes.