Answer to primary question
What draws me to poker is the beauty of what it allows. I don't give a damn about Islam or what it says about gambling, gambling (especially in the form of poker) is one of the most morally correct ways to make money. It not only inherently does this by teaching you discipline but the entire process is good for you in many, many ways. It increases your overall IQ (unless you stick to slow paced software/tables) because of the amount you need to take into account in a given time, multi-tabling to 3 is a good way to push this as you're reading into one table, distracted by another and at the same time need to consider the third.
Poker is beautiful for another reason though, and this reason is entirely intricate to poker alone and is something that no other form of gambling offers other than perhaps Bridge (assuming you are in a real competitive pairing, not playing individually and just randomly paired). This reason is that you are actually doing a service when you win and a service when you lose. Whether you win or lose you're firstly upkeeping the establishment, be it a site or real casino. This is more relevant in your tipping of dealers in games (the casino takes the rake, they don't pay it to the dealer, they make over half their living from the tips given, the exception is in tournaments because tipping doesn't happen there so they are paid wages for that). Aside from this, when you beat people, even if it is a bad beat, you teach them lessons about emotional resilience and, if it was a good beat, you inspire them to improve at the game to 'be as good as him/her(you)'. When you lose to people, you do them a service as you are paying them if they make a living from poker or you are keeping the fish coming back if it was a suckout.
This means no matter what, you know you are doing great things when playing poker. Screw the haters, this is my way of making cash for now and perhaps for my whole life.
Answer to latter question
Poker cannot work without either 'money' or 'fake money' so the concept of poker without something that matters in the SAME WAY AS money (such as your ranking on a free site with visible fake bankroll to make it competitive) is pointless. A valuable number that equates to what money is to the human subconscious is innate to poker. Gambling means nothing if you cannot numerically lose something you badly want to gain instead.