Indeed. I used to be FRA International Selection Chairman and this was never a burning issue with anyone. It can be argued that the men's race is the men's race and the women's similarly and the respective heights/distances don't matter a fig. If the distances in XC are made the same (and I am completely indifferent) then what exactly would have been proved?
This is not the same point as, say, completing a classic course like a marathon or Ennerdale, where to only run 7/8th of Ennerdale doesn't have quite the same cachet (apart from other practical difficulties).
But XC? It's only a glorified park run.