I don’t think anyone on this thread has been arguing that this is the case at all and is a serious misrepresentation of the issue that is being discussed.
For the avoidance of doubt it appears to me that a devolved authority in this case the Welsh Govt and its devolved transport authority TfW are “in control” of significant parts of the rail operations in border areas of England in Herefordshire, Shropshire and Cheshire. This is in part due to historical arrangements and the fact Wales doesn’t have its own N/S alignment and relies on English infra to get between N and S and also needs access via the network to the large cities of Bristol, Brum, Manc and Liverpool. None of this is disputed and I’ve gone out my way to suggest TfW and the Welsh Govt have a good record in not favouring Wales over the Borders and outcomes are in the main quite good. (I have no evidence for this and maybe the Council's of those English counties feel disadvantaged?)
However, the question remains, should the Welsh Govt be controlling operations of trains that run solely within England? For instance Chester-Crewe, Chester - Liverpool, Shrewsbury to Crewe. It seems to be a failure of English devolution that these things occur and if we’re being honest the Welsh Govy and TfW have enough issues to be dealing with without worrying about stuff that England itself should be sorting out. Of course the context of cross border will always come into these things and balancing a GB network with local reqts is difficult and maybe the current solution is optimum but Im not so sure.
Of course if England had proper devolved Regional Transport Authorities (wherefor art thou Transport for Mercia) this would be moot but we don’t and we continue relying on our current inadequate arrangements.
But you aren't listening or understanding.
However, the question remains, should the Welsh Govt be controlling operations of trains that run solely within England?
That statement is simply not the case. They do not do any such thing. They merely operate the service according to the specification that the English DfT (or other English bodies like Merseytravel) asks them to and provided funding for. TfW aren't unilaterally deciding how those services are ran, the fares available for them etc. England is doing that.
DfT and other English organisations already control the operations of the Borders side of TfW. TfW just runs the train.
It would be insanity to create artificial borders and start splitting services up simply for administrative purposes.
Crewe to Chester is shortly to become Crewe to Wrexham and much later, Gobowen and Shrewsbury once the signalling is sorted.
Bidston to Wrexham will become Liverpool to Wrexham
Liverpool to Chester will become Liverpool to Cardiff
Chester to Manchester already actually is North Wales to Manchester.
Crewe to Shrewsbury is mainly Manchester to Cardiff with a very irregular local service that occasionally has gone into Central Wales/Heart of Wales.
These aren't services which are "only" English.