Perhaps those people who go on and on and on about this are unaware, or don't care, that three large operaters serving Wales, and stations in Wales, make no mention of this in their titles. Great Western, Virgin and Cross Country. Nobody, to my knowledge, has died or been otherwise seriously inconvenienced by this so please give it a rest and find something sensible to grumble about.
No, of course no one understands this...
The issue does not arise in those cases, because their names aren't exactly geographically-specific for fairly obvious reasons.
Unlike Transport for Wales - a TOC which does not just serve Wales and runs trains deep into England, whereas Scotrail, to take the obvious example, has just one short incursion into England from Gretna to Carlisle.
Would all those people professing to be completely relaxed about the TfW name be quite so relaxed if a meaningless - sorry, neutral - brand like Silverlink or c2c had been used instead?
There were geographical maps on the TfW website but they had to be withdrawn after a day or two for the reasons noted on this page, where they have been preserved. No new ones have yet appeared.
So there were some maps - though you have to wonder how they ever saw the light of day in the first place reading the litany of problems with them. Maps which neatly illustrate the extent of the parts of the operation that are not for Wales or across Wales.