That's not what the posts you're talking about are saying though, is it?
Consider it this way: a whole load of stations have been built where demand has been somewhere between 'disappointing' and 'laughable':
- Reston
- Bow Street
- Worcestershire Parkway
- Stow
- Bermuda Park
- East Midlands Parkway
- Conon Bridge
- Blackridge
- Aylesbury Vale Parkway
- Howwood
- Whitwell
- Creswell
- Corby
And that's just the recent ones, not including older examples in the later BR days.
Other cases involve stations which have opened in locations where demand
could have been sufficient to justify stopping, but have been served so poorly they weren't remotely worth it, noting that some are now or will soon be fixed:
- Laurencekirk
- Fishguard & Goodwick
- Soham
- Inverness Airport
- James Cook
- Energlyn & Churchill Park
- Beauly
- Conon Bridge
Finally a number of other projects are certainly nice to have, but mainly just carry existing rail demand, including White Rose and Warrington West.