Xeviat
Dungeon Mistress, she/her
BTW, you can give your wizard expertise in Arcana, but you really have to go out of your way to do it (via being a human and taking the Prodigy feat or via multiclassing, both of which technically fall under the optional rules umbrella). And yes, this also annoys me to no end.
And one of those options would require multiclassing into Bard or Rogue which brings other baggage.
If all rangers learn how to vanish and hide in plain sight, it seems like all rangers should be good at stealth.