Interesting topic. I disagree with you that poker would be some kind of bad thing spiritually. The main thing is to remember that poker is indeed just a game and even though some take it very seriously, it should still be fun. Bad beats and losses are part of the game but that's what makes it interesting. Of course you get negative emotions as well along the way but every other hobby has those moments too. It's the attitude that makes the difference in the end.
I have also wondered many times why people consider poker players as liars? It's not lying, it's a game where you are supposed to do that. Think about sports as well: soccer players are lying all the time that they are hurt when they're not
They might even hurt others physically but it doesn't mean that those people would be horrible persons outside the game. So why would poker players be? Most poker players are actually really nice people, even right there at the table.
Personality might have some kind of impact on how you play but I wouldn't give too much attention to that either. I am pretty shy in the real-world but when I enter a poker tournament, I want to ruthlessly take everyone's money
It's true that the outcome of the game, good and bad, might stay with you for a while after the game and give you negative emotions as well but that's how it is. Poker is like a rollercoaster ride, you have ups and downs, laughter and horror. We just need to learn to enjoy the ride.