That was something Ridley worked on a bit on the Collaborative Saga Edit thread.

I definitely think that change, and the “a Jedi master” change are fairly harmless changes. I can see the arguments against the “I wanted you to have this” argument. I guess for me it just felt more like a blatant, manipulative lie on Obi-Wan’s part. Whereas the Vader lie could arguably be for Luke’s own safety. The other questionable bit would be “He feared you might follow old Obi-Wan on some damn fool idealistic crusade like your father did.”

While not really accurate, Obi-Wan could be repeating something Owen said to him, based off his own perspective. So the quote could be seen as: He feared you might follow old Obi-Wan on some “damn fool idealistic crusade” like your father did.