He's not using the I didn't know it was wrong defense (that was earlier) but the my lawyers told me it was fine defense (his previous lawyers, not these two).
So, I don't think these statements matter to his current defensive strategy.
Honest question, is that a defense that has ever actually worked for crimes this serious? I can understand something like "Your honor, I totally thought I could park there because a police officer said it was fine, but then the parking enforcement wrote me a ticket!" But not "Your honor, a very Bigly smart man said I could totally disenfranchise all of America and it is very cool and very legal!"
It was a trap by the special counsel set by… getting him to hire terrible attorneys? I would think that more a consequence of the magnitude of his crimes + his history of nonpayment, leaving only desperate lawyers willing to be the next in line trying to defend one of the most obvious criminals in recent history and humiliating themselves in the process