Yeah you should definitely not just learn the question bank blah blah blah. Most of what you learn in the UK ATPL exams is almost utterly useless. Who cares how a VOR station works or about the ins and outs of a mercator projection compared to a transverse one. So what if I have forgotten the formula for lift and don't even remember what divergence is, something about courses on a chart??. Is it important to know the name of a wind in Africa? Most of air law is also irrelevant unless you plan to start your own airline. There is just so much pointless information you are expected to learn that you will never again need in the whole of your career.