...can avoid bypassing intermediate villages, in order to serve them, when the Victorians would have contented themselves with plonking down a platform at a bridge a couple of miles away, on the grounds that's good enough when people have no other choice?
Absolutely not. These days people do have a choice so there is much more of a need for stations to be in convenient places. Building stations in rubbish places because it's easier is simply repeating the mistakes of the Victorians in a less appropriate setting and with less excuse.
Easier to see that it's possible when there are still traces of an old line there, while a completely new route does not thus advertise itself?
I agree it's worth serving as many intermediate villages as possible, with stations which are as well located as possible. But Victorian railway builders had the two advantages of easier compulsary purchase, and villages which hadn't grown as large. So wholly new routes to serve towns and villages will need to justify the amount of demolition they involve.
It probably explains why so much of the country's post privatisation railway expansion has been tram based- light rail is useful for allowing well located stations in towns at a reasonable price. But no-one has built a modern rural tramway, with a Class 398 every half hour on a route from a town to a mainline junction station, in the UK.
Without access to trams, and with limited funds for compolsury purchase, a new line would have to thread itself around the edge of towns. There is a good example of that in South West London- the Wimbledon to Sutton line came later than most of the development in it's area, and so threads it's way around the houses which already existed when it was built.
Anyway, it's interesting to think about new alighments vs reopened ones.