Yes, it’s intentional. When you make a ranged attack roll within 5 feet of an enemy, you normally suffer disadvantage (PH, 195). The second benefit of Crossbow Expert prevents you from suffering that disadvantage, whether or not the ranged attack is with a crossbow.
When designing a feat with a narrow use, we consider adding at least one element that can benefit a character more broadly-a bit of mastery that your character brings from one situation to another. The second benefit of Crossbow Expert is such an element, as is the first benefit of Great Weapon Master. That element in Crossbow Expert shows that some of the character’s expertise with one type of thing-crossbows, in this case-transfers to other things.