I agree with both of these posters.
It's fine to suggest that
everyone else loses direct links and long established services but the real test is whether you'd accept it on your own route (or, perhaps, your boyhood route).
For example, I live in Sheffield...
...Sheffield has had a direct service each hour to Manchester Airport since the 1990s (ignoring "temporary" Covid timetables)...
...I've used the direct service to/from Manchester Airport in the past - it was convenient for me...
...I know a number of people who do use the direct train from time to time...
...cutting this link will inconvenience some people in Sheffield (and the same goes for places east of Sheffield)...
...but cutting the link makes sense in the grand scheme of things - it'll upset a number of people this side of the Pennines, it'll potentially inconvenience me if I ever take another foreign holiday, but it's a price worth paying (to ensure a simpler and more reliable service from Sheffield to central Manchester and remove conflicts for other services).
I'm not going to argue that "it's unfair for Sheffield to lose its Airport link because other routes aren't sharing the pain" - it wouldn't be practical for every line to lose 10% of its Airport services, it's much better to drop one hourly service in full.
But then, it's only a few posts ago that
@Bletchleyite was suggesting that one line west of Wigan Wallgate (Kirkby) should lose all of its direct Manchester services but it'd apparently be unfair for the other line west of Wigan Wallgate to have the proposed changes (even though Southport would still have two trains per hour to Manchester under these plans - the same frequency it's had since I can remember) - fine for other routes to be simplified in the interests of simplification but not your own pet line I guess.
We don't have enough capacity in/around Manchester for everywhere to have a direct service to everywhere. We aren't going to build two additional through platforms at Piccadilly any time soon. Ordsall exists, so it's too late to worry about whether it was worthwhile building it. We need a simpler network of services that deals with the finite amount of paths that are available and minimises conflicting movements as much as possible (obviously some conflicts are going to be unavoidable given all of the flat junctions). Easier to remember timetables, such as a half hourly pattern on routes where possible (and multiples thereof).
Some places are losing their entire Manchester services under these plans (e.g. local stations west of Warrington), some places are seeing their Manchester journey times significantly increased (e.g. stations west of Chester), some places are making a lot less fuss than a seaside town that will retain it's two trains per hour to Manchester.
The idea that one little route is so important that it's worth breaking things for is a nonsense - if we allow one wealthy group of commuters to badger the PM and get their special little service maintained then the whole thing falls apart - if Southport passengers are so worthy of having their services untouched then where do we draw the line?