I think that when you start playing poker and do it with friends you can show your
hands and analyze the cards on the table to learn.
Otherwise, in a real game I do not need to see it, actually it may even blur my perception.
I see a single card as a range or a probability for example
a card's suit can be
25% spades
25% clubs
25% hearts
25% diamonds
[ or a little less that 25% if there are already drawn some cards of that suit]
then the analysis of play goes like
what would happened if the card suit is spades
what would happened if the card suit is clubs
what would happened if the card suit is hearts
what would happened if the card suit is diamonds
But if I see that the covered card is spades, and maybe in another hand I see spades
again, I would tend to believe that the spades probability is bigger than 1/4.
Similar with the opponent hands.