Board Thread:Theories and Speculation/@comment-44142243-20200416151624/@comment-4961229-20200428223840

Orochimaru's sword has an existence independent of him. We've seen it lying on the ground. Show me SoT's independent existence. Show SoT lying on the ground. You can't.

Itachi made plans to advance Sasuke's Sharingan. He actively told him to seek Mangekyou. That was to make him as strong as possible so that he could believe that he could kill Itachi and be strong enough to survive anything. He could program Koto to activate under any circumstances he wanted. He certainly didn't need to rely on Sasuke having his eyes. It's asinine to believe that the only reason he wanted Sasuke stronger was so he could Koto him.

Any number of conclusions could be drawn from that such as 1) Orochimaru was looking for a legend he didn't understand and 2) Orochimaru mistakenly drew the same false conclusion that you did, because Oro is known for making all sorts of mistakes, like attacking Itach twice.