Yeah the jurors said exactly that after the trial.
http://deadspin.com/jurors-say-aaron-hernandezs-defense-was-baffling-1697994540
Actually after reading that article, I kind of borderline wonder if Hernandez's lawyers didn't want to see him get away with it either. I know that's not what a lawyer professionally should be doing, but still . . .
Attorneys are sometimes reduced to making arguments they never would have made if their clients had been honest with them in the first place. Clients routinely lie to their attorneys in litigation, and as a result attorneys sometimes end up forced to pull arguments out of their ass without thinking much about how they will be received. I have no idea whether that happened in the Hernandez case, and have not read the link because I don't care enough about Hernandez to make even that minimal effort.
I once was representing a client in a bench trial in contract case and a central issue was whether the other side (the defendant) had actually signed a receipt reflecting delivery. My client said he did and produced the signed receipt, which I dutifully copied and introduced into evidence, confronting the other side with it when he took the stand and of course handing a copy of it to the judge for his examination so he could see that the other side was a liar and had acknowledged receipt and signed for it.
As I continued hammering at the other party on the witness stand I noticed Judge Holcomb picking up the document I had just handed him, the receipt, and carefully comparing it to the other document with the defendant's signature on it... and I noticed the judge seemed to be making faces.
I very quickly for the first time closely looked myself at the two documents... the signatures were not even remotely close, though the "receipt" signature did look amazingly similar to my client's handwriting. (My guy lost, and I felt good he did -- he should have been charged with perjury.)