'Red Dead Redemption 2' gets blackjack wrong, but it's a fixable problem

Video games suck at blackjack. 
Red Dead Redemption 2 is a convenient target, being the latest and most high-profile offender. But video game blackjack hasn't ever been done right in my recollection. And it's because every game gets a central component wrong: The key to blackjack, the thing that makes it interesting, is the betting. Not the rules.
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So let's talk first about those rules, the absolute basics of blackjack. How ea