I think the Abhidhamma is precise. We might believe we are watching this or that but when analysed there are only brief moments, no one watching at all - just as the Abhidhamma and Commentaries say.
Take the example of knowing “that is a rose”. In fact that quick recognition is composed of many, many moments.
ABHIDHAMMA STUDIES BUDDHIST EXPLORATIONS OF CONSCIOUSNESS AND TIME
NYANAPONIKA THERA
according to the deeply penetrative analysis of the Abhidhamma the apparently simple act of seeing a rose, for example, is in reality a very complex process composed of different phases, each consisting of numerous smaller combinations of conscious processes (cittavīthi), which again are made up of several single moments of consciousness (cittakkhaṇa) following each other in a definite sequence of diverse functions. Among these phases there is one that connects the present perception of a rose with a previous one, and there is another that attaches to the present perception the name “rose,” remembered from previous experience. Not only in relation to similar experiences in a relatively distant past, but also between those infinitesimally brief single phases and successive processes, the connecting function of rudimentary “memory” must be assumed to operate, because each phase and each lesser successive state has to “remember” the previous one—a process called by the later Ābhidhammikas “grasping the past” (atīta-gahaṇa). Finally, the individual contributions of all those different perceptual processes have to be remembered and coordinated in order to form the final and complete perception of a rose.
It is all happening so quickly, just different jati alternating by conditions.