Royal Enfield tuning 4 - possible reasons why retarding inlet cam timing often improves performance

Videos discussing 'how to' retard the inlet cam timing have already been made and can be found in my recently started playlist titled 'Royal Enfield tuning', to which I will be gradually adding older videos already made, as well as any new material which may be relevant as it is produced. Here, I ponder and discuss some of the potentially beneficial effects of retarding the inlet timing, which certainly seems to work for some reason, or reasons, whether my theories as to why are correct or not!