So All Elves know Elvish? That's because it's intrinsically a part of them.
That seems simplistic and drastic. All dwarves know dwarvish, and all gnomes know gnomish... so now language is intrinsically part of every D&D race?
There needs to be room for both interpretations
In a game that has a very long history with homebrewing, "there needs to be room for" should get some scrutiny. Some will say that it must be explicit in the mechanics, others will say, "If nothing falls apart if I swap the weapon for a tool, that's enough room."