No, we are not talking about 5 cards draw poker. We are talking about the concept of poker in general, s1eepy just explained you. If you can't see the similarities and resort to the basic "both games use cards" well...
Just to make an example: 7-8 card stud, omaha and even holdem' are among those mostly based on synergy and combos instead of just drawing cards to your hand, like you see it.
Another one would be variations where one suit in a certain situations/combos is superior to the other.
Sounds familiar?
About your betting "argument" - nobody sees your cards in poker (in some instances, part of them - yes) unless you reveal them or cards on the board for all parties to use.
Just to make an example: 7-8 card stud, omaha and even holdem' are among those mostly based on synergy and combos instead of just drawing cards to your hand, like you see it.
Another one would be variations where one suit in a certain situations/combos is superior to the other.
Sounds familiar?
About your betting "argument" - nobody sees your cards in poker (in some instances, part of them - yes) unless you reveal them or cards on the board for all parties to use.