No, you use whatever version of the "facts" you can dream up to fit your narrative. For example, I didn't say they drafted him as a safety, I said they drafted him as a player who can play at either safety or CB. The video I posted confirms that. You are, as always, running from actual facts and making up your own version.
As for him playing more CB as a rookie, again, look at the video. Garrett specifically said he may start out at CB, but he may end up playing safety for the team. In fact, a few times they link his position to whether Claiborne gets back and healthy, saying he will play CB in Claiborne's absence, but will play safety if Claiborne is healthy.
But why bother with what Jerry Jones and Jason Garrett said, right? You know they never intended to use him at safety when they drafted him, despite the fact that in the press conference after drafting Jones they said repeatedly they drafted him largely because he would be an option at either CB or safety. You know they didn't mean it, right? Why believe their actual words when we have you to tell us what they mean?
Another place you are making up your version is saying that I've claimed the switch is easy - I never said that either. What I said is it can be done, and it's not at all uncommon for it to be done. You asked for examples because you didn't believe me, and when I gave them to you, you made up yet another version of your story.
And, the funny thing is, it wouldn't even matter one whit if the Cowboys didn't really intend to use him at safety on draft day. Situations change, and the coach has to put the best version of the team on the field that he can. That's why Free switched from LT to RT, and why Collins switched from LG to RT, and why Irving switched from DE to DT. It would ridiculous to suggest that coaches should have no ability to adjust as circumstances adjust. That's not life in the real world, and it's not life in the NFL.