Of course, as you say this is about trusting the published statistics from the country itself. In the case of Switzerland, I can say from anecdotal experience that 92% is probably very close to the truth, if that helps?
They're not.
Zurich is 225km from Lausanne and 125km from Bern. Geneva is 254km from Basel, 371km from Lugano, 265km from Lucerne and 277km from Zurich.
I think the opposite of your claim is closer to the truth (though it also has exceptions) than your claim.
The structure would probably need to change for larger countries though, it's true. But you could keep a lot of it; create long distance rails between major cities with stops along these rails for smaller towns to feed into. Some European countries have this type of structure, Italy for example, though it does get very tricky for the very smallest villages
The trains run more often and go to more places than any other place I've ever been to.
Finally, this was the first time in over 20 years of light rail use in Switzerland that I experienced this.
Though there's usually replacement trains for those use cases. The main stations have a standby train (Dispozug) ready to immediately replace any train that's cancelled or delayed (and avoid propagating delays).
https://twitter.com/SBBTrainDriver/status/150809526141493657... (is an example, the driver spends 3h+ just waiting in the train in case it needs to replace another train)
It does stop at all stops unless it's really late and passengers might as well get out at a stopover station and transfer trains, however if it's sufficiently delayed it may be put on side tracks to let other trains pass to prevent a ripple effect, delaying the train even more to keep the rest of the system working well.
The rail company has a government-imposed punctuality target and their result is used in the calculation of how much money they get from the government the next year, i.e. the usual "once a KPI becomes a target..."
https://company.sbb.ch/de/ueber-die-sbb/verantwortung/die-sb...
If we are to trust to published statistics form other countries for 2018, and using for the Swiss system, the 2021 data mentioned in the article: "about 92% of passenger trains were on-time" this would make it for punctuality, somewhat middle of the league. Behind Poland, Greece and Bulgaria for example.
This is assuming being on time is: "a delay of five minutes or less". For Swiss network the article uses the definition: "a delay of three minutes or less".
"Share of regional and local passenger rail services classified as punctual in Europe in 2018, by country": https://www.statista.com/statistics/1255048/punctuality-regi...