I am inclined to think if it was god enough for switching back and forth between apps and devices, it would be good enough for the academics to do so as well.
What you seem to be asking for is that every device and app out there should start making use of Adobe's counting system. That would be one solution, but I don't think it is realistically going to happen -- it is up to the whims of device/app makers, most of whom don't care.
It would also only work for your personal copy of the book --no guarantees anyone else's book looks the same inside. Granted, that doesn't concern you -- but it does lessen the general desirability of such a feature.
It is on the feature requests list, so it may happen one day. Admittedly, kguil appears to have lost interest in active Marvin development, so who knows when that may be...
P.S. Your English communicates just fine, and is quite polite.

-- Maybe minor grammatical clumsiness, but that is acceptable in a non-native speaker.

You can set your location
HERE -- if people see where you live, you don't have to append every post with that disclaimer. And we are very accepting here -- it is one of the nice things about this forum.