Nobody expected Salty to compare to Varitek. At best, they wanted him to be below average defensively....which is what Vmart was.
Varitek also didnt do s*** early in his career, because of his whole drafting process and contract hold out because of Scott Boras. He essentially started his career almost 4-5 years later than someone drafted out of college. See article paraphrase here: Jason was drafted by the Seattle Mariners in the first round of the 1994 amateur draft, and the 14th pick overall. A pioneer of the loopholes in the draft process (see article here), he signed with a small team in the independent Northern League before agreeing to terms with the Mariners. He did not enter the Mariners minor league system until 1995, playing for the Port City Roosters. Varitek was 23 years old before he got his first professional plate appearance in AA. Salty was 18 years old when he got his first professional game appearances.
Varitek was also a 3B who hit right handed who MADE himself a catcher and a switch hitter in college at Georgia Tech, which is pretty spectacular considering how good he ended up being. Salty was a catcher the whole way through, and sucked the whole way through.
You also have to take in account what his pitchers thought of him. Curt Schilling came to Boston because of Varitek. Beckett will only throw to Varitek, his "binky", and in Japan Varitek is seen as some sort of hero that Dice-K couldnt wait to pitch to (even though it hasnt worked out as planned).Pedro was an advocate for Varitek....is it any coincidence that our elite pitchers have all wanted to throw to him?
This isnt ass kissing for Varitek, its just that we want a catcher who can catch, block balls, frame pitches and call a game.....and do the simple things, like make a nice snap throw back to the mound rather than lob it back to them at an area thats anyones guess.
Salty cannot even do the most basic of his defensive responsibilities and its inexcusable at this level, they have already tried working with him and has spent significant time in the minors trying to fix it. The experiment needs to end before it becomes an achilles heel, even if that means Varitek catches more than he has to and hits .150.