[schubes]

You are letting your pseudo-game theory cloud your judgment here. You are in the situation of calling one bet to win two. You need to be the winner more than a 3rd of the time here. When SB limps and draws 3 - they already have 22 beat far more than 2/3 of the time!

Like I said before if they are limping with high cards enough to make calling with 22 better than folding, they are making such a huge mistake by auto betting it is a crime to discourage it by drawing 3.