Some players think that working in games that allow the dealer to hit a soft 17 is good for their blackjack strategy.
They would be mistaken.
Sure, on the surface a dealer hitting a soft 17 sounds like a good thing. Players might think that the dealer has a better shot of busting because he is so close to 21. But what these players are forgetting is that Ace. The Ace that makes that soft 17 soft can be reduced to a 1 if the dealer hits and receives a card that would cause him to bust.
Because of that Ace, dealers can actually reduce that 17 to an 8 and hit to rebuild a stronger hand. He might then wind up with a hard 17 or higher that stands a shot of beating the player. Just like how an Ace can benefit a player, so too can it benefit the dealer. A soft 17 can be rebuilt whereas a hard 17 has a better shot of being beat by the player.
With that ability to rebuild his soft 17, the house’s edge goes up by 0.2%.
That is quite an increase. Think about it. Basic strategy can lower the house edge to around 0.5%. But if one of the house rules allows the dealer to hit a soft 17 and the house gains 0.2% on their edge, that puts the house’s edge at 0.7%.
In short, playing in a game of blackjack that allows a dealer to hit a soft 17 undoes just under half of what basic strategy works to accomplish. That is a big impact to a player’s blackjack odds and to a player’s opportunities to make a profit from blackjack.
Hence trying to play in games that allow the dealer to hit a soft 17 are not just bad for blackjack strategy—they are very bad and should be avoided.