Wizards get Religion as an optional skill because it's a thing that used to be a Knowledge skill in previous editions, and wizards got all Knowledge skills as options.
Rogues get int saves because everyone gets one strong save (wis, con, dex) and one weak save (cha, int, str), and int made more sense than the other two.
Rogues get int saves because everyone gets one strong save (wis, con, dex) and one weak save (cha, int, str), and int made more sense than the other two.