I would surmise that the biggest impediment to more pilots opting to leave everything in is FOQA, stable approach criteria and touchdown monitoring that is now prevalent in airlines, as well as ATC track/speed monitoring plus airport noise monitoring. To keep the skills up one must accept the occasional deviation as we are human pilots not dumb dutiful machines. However a few calls from the "Lord FOQA" or ATC report about a "deviation" or "noise bust" you understand that it just is not worth it!
I am sure you are right. That may be why some Asian operators have a policy of not letting their first officers take off or land or even do a non-precision approach until they have completed five years as co-pilot on type.
That approach is counter productive and plainly ridiculous but that is ethnic culture at work and that will never change..