Of course the only reason you would go from Carlisle to Lancaster via the Coast, other than in a situation where there was severe disruption on the WCML, is for the enjoyment of it. I suppose it depends on whether you would consider that "pointless" or not - I wouldn't otherwise every single preserved line is pointless!
What
is pointless is Avanti's "via Penrith" Anytime Return at £64.60, because Northern's "Any Permitted" Anytime Return is just £41.80 - so the former should never be sold and probably shouldn't really exist!