Why didnt walt try the confession approach with hank?

He uses a false story to implicate hank as his accomplice, but he could have actually altered the details to make himself a victim to hank. there is a lot of cards he could play:

1.credible evidence. he already had a good deal of it with the confession tape, and he could have twisted some details. like, he is a mild mannered chemistry teacher who wanted to help his student, jesse pinkman, a known meth dealer who rejected his help but later forced him to cook meth for gus and later jack in the gang who were the real ones who killed gus and hector. he actually could add even more (like, the scene where he drunkenly confesses. obviously, its walt ego, but he could have told hank it was a cry for help. if he was really a kingpin why would he openly encourage hank investigation? also, jack gang is the one who directly assassinated the witnesses, and because walt covered his tracks he could point to them as the current mastermind not him. this would have the added bonus of getting rid of a potential enemy as well). hed have to betray jesse, but as we see between his family and jesse he would always choose the former.

2. emotional connection to hank. he could draw on the family bond with hank and remind him after the story that "do you think i am (psychologically)capable for doing this"? everyone thinks of walt as a stammering dweeb, hank most of all, and he would start to doubt if walt was capable of masterminding a drug empire.

3. acting skills. his ace in the hole, combined with he above. walt is an expert at manipulating his loved ones (walt Jr, jesse, even skylar and hank/marie themselves). we know he can do it on short notice, re: lily of the valley. combined with his sob story and the connection to hank he could really convince hank that he wasnt responsible, or at least only tangentially involved.