Don't be blinded by science!
For road riding, I'm not to keen on the idea or the term 'turn in point'. That's very much a track based tool that has little relevance on the road, and to me smacks of braking points, Keith Codes 'two step' approach to cornering, faster lap times and all that. Good fun, a good science, but not for the road.
I think understanding what a turn point is helps on the road, again i don't really have them as road riding is too fluid and dependant on surface (which often changes from one day to the next) and other traffic etc.
However I do know at some point I must turn, the other Code term I like is "Target Fixation" very common, everyone gets it from time to time, but I recognise it, if it is caused by me approaching a bend a bit too quick I know I must turn and I must look where I want to go, so instead of panick braking and heading towards the hedge, I look through the bend and know I need to get off the brakes at some point and turn the bike so I may choose a turn point based upon if I do not turn by then I will not make the corner.
So I look into the bend, turn in and then apply "throttle control rule number one" I am sure all this stuff has saved me on several occasions.
I am still pretty crap, but I know what I am doing wrong and how to improve (although it is slow progress) I recognise when I am getting out of my depth and how to control the panic and get back on track, then kick myself for being a dick in the first place.
Training is always good, both IAM type stuff, Roadcraft courses and handling courses, bike control improvement is as useful as roadcraft improvement, but religously applying science is fruitless on the road or track in my experience as there are always variable which cause you to alter your plans slightly.