From what I know about how our brain process visual information the more info you provide to your brain the easier it is for your brain to "fulfill" your wish regarding both potting and position play. And by pointing to a certain spot at the table you basically give your brain such info about where you want to put cueball for example. I give you that the more advanced the player is the less info his/her brain needs to do what he/she wants to do but even top pros stop from time to time to "feed" their brain with info needed. On the other hand you said yourself that you were watching an amateur match so you could at least expect slower/more deliberate aproach to the game
Best post on this subject yet.
Maniac (of course there's a reason many pros point)