This odd friendship was cut from TNG
TNG didn’t adhere to all of Roddenberry’s decisions
Series creator Gene Roddenberry wrote a series bible that dealt with all of the characters on Star Trek: The Next Generation. Not only did he describe them and their jobs, he had written who would be friends with whom and what types of romantic relationships would take place aboard the Enterprise. Unsurprisingly, some changes were made as the show began, and while a good portion of Roddenberry’s decisions were followed, some were either changed or obliterated altogether.
Screenrant writes that Roddenberry had planned a strong friendship between Lieutenant Tasha Yar and Wesley Crusher. Yar had a horrifically violent childhood, and that would have caused her to immediately connect with Wesley and treat him like a childhood friend. In fact, the bible goes so far as to say that she would think he was “the most wonderful person imaginable.”
Fortunately, TNG producers cut the relationship
With the difference in their ages, this friendship would have had issues from the start. Undoubtedly, the teenage Wesley would have developed a crush on Tasha which would have made things difficult. And I can’t imagine Dr. Beverly Crusher being okay with her son having a close friendship with an older woman.
It’s perfectly clear to me why the producers decided to nix this idea from Roddenberry’s bible. Tasha Yar and Wesley Crusher were as far apart as Mars and Earth and had nothing in common other than their love of space travel and the Enterprise. She certainly couldn’t have regaled him with tales of her childhood without traumatizing him. Maybe if Wesley had been several years older, this would have worked. Since he wasn’t, though, it’s a relief that this was one part of the bible that was skipped over.