Thank you.

I agree with your comments.

The dynamic value of the hand (or position) should be a function of known cards, number of people in the pot, and their playing styles.

Of course you need to observe the play of your opponents to make assumtions about their playing styles. After you do this you will be able to use math to determine the dynamic value of your hand/position and choose the OPTIMAL strategy in this situation.

The more experienced and professional the player will be, the more accurate the assumtions will be. Therefore, in the long run the more profitable will be the game.