Indeed. Apologies for bringing up Conisbrough again, but it is a station which epitomises the current problem. At a station which has had no ticketing facilities for 30+ years, it would have been very easy for Northern to (i) put a sign/poster at the entrance stating something along the lines of "ticket machine now available on platform 1" & (ii) add "buy tickets here" signage on/next to the new TVM. They chose to do neither and, as I have witnessed, people just do not know the TVM is there.
After a suitable 'new thing' period the sign/poster at the entrance could be changed to "buy your tickets from the machine on platform 1 before you board ....."
If people then chose to ignore clear signage, on their head be it.