You are going to need to explain this. Rules are rules, how can they not be learnt by reading a book? Do instructors read through the entire rule book in front of a class?
The contact time can then concentrate on testing, context, and application.
I’ve already explained. You need people to go from zero knowledge to a set standard, with a particular emphasis on the aspects of the rules relevant to that operator’s route network. Hence intensive classroom sessions make sense. Even more so with traction training - it doesn’t really make sense to talk about separating context and application, and it isn’t something that can be learned by reading a book.
No, the instructors wont “read through the entire rule book in front of a class”.
Generally the rule book will be referred to along with specific examples, in an interactive way involving group learning. Much the same as most training sessions in most industries I’ve worked in.
You have already given two big examples of things you could learn on a desktop!
The military do not just rely on full motion simulators. They have tablets and cardboard cockpits for learning, then desktop basic simulators for procedures training. Then the full motion simulators and actual flying can concentrate on the top level training only those can replicate.
Bear in mind high costs mean the military have even more reason to reduce actual flying than the railway does cab time.
As I’ve already pointed out, those things are already taught on desktop simulators. That doesn’t meaningfully reduce the need to complete training hours actually driving hours as you suggested above. The sims used in the airline context can reduce flying hours (albeit even they aren’t a substitute for flying the real aircraft).
It should hopefully be obvious that what’s suitable for military flying training isn’t necessarily going to be suitable for training train drivers, and vice versa. They are two completely different industries and environments.
I was asking whether the IR structure allowed for serious one off bonuses to solve particular training shortages in time and place.
What are these “serious bonuses”

? The issue is generally that TOCs don’t pay enough to make it worth doing, and do their best to do it on the cheap and wonder why they struggle to get volunteers. You also need to ensure that the people who become instructors/mentors are appropriate - it isn’t just about the money.
The “IR structure” (whatever that actually means) has little to do with it.