(Existing) weapon infocards have always been mostly ignored by dev teams and are therefore woefully out of date. Made most evident by the SNAC still being the SNAC despite being a completely different weapon since 5.0.
And while it's true that most people ignore the infocards anyway and just look at the stats, newer players may not yet be sure what exactly the stats mean in practice and a little worldbuilding fluff has never hurt anyone anyway.
