Dear OP,
You need to understand the difference between 'technical' or 'professional railway' meanings and what the general public may understand by terms used.
A driver needs to know routes intimately. He/she needs to know that at (say) MP 47/that overbridge I should be doing 70 mph but I need to start braking in order to be down to 35 mph for the speed restriction over the XYZ crossing - or whatever. A good driver, in poor conditions (say at leafall) will know even better and more nuanced what to do, but that only comes with experience. (I stand to be corrected, I've never been footplate crew, just from what I've seen how they worked a few decades ago.)
A station worker does not need to know this in-depth knowledge.
But you will need to know, or expected to learn (and given teaching, or time to learn) general route knowledge. eg that at (say) Basingstoke, trains to Exeter go via Andover and Salisbury, and not (at least normally) via Eastleigh.
These are two vastly different sets of knowledge.
In the old days, you started as a junior porter (or whatever it was called on your line) and you picked this up with the help of senior staff.