It's a compromise, just as the 2200 Newcastle routing is a compromise. NR didn't want any of these late night trains to be running, the compromise is they run to the main destination but not necessarily on the usual route. The 0425 from Newcastle almost went for a similar reason.
I think there's a compromise to be had in not having lots of competing services through the night (as was the case between London and Gatwick) but also not impeding the main InterCity service to important hub destinations such as Wakefield.