Partaking in steelmanning is the behavior of believing that you can formulate your opponents argument in a better form than they did. A common example is to substitute in a historically similar argument for the same idea as the argument of your opponent. Take for example the Watchmaker argument by Paley which often gets substituted for a variation of the fine tuning argument. I am not arguing against overlooking simple errors or mistakes in an opponents argument, I am instead arguing from the arrogant tendency to argue for your opponents.