Silly question

[KageTokage]

They're still attached to your face tho and they're still basically your ears.
Even if your ears were solid imagine someone slams you in the ears with a sword.

It's the same with tails it's kinda silly honestly to have them out they wouldn't last long xD.

Word of god claimed that they can regrow both their horns and tails, so I'd assume they're not that much of a liability in combat.

The Radiant maiming/fending sets also accounted for the latter by including tail armor; a logical design choice from a nation with a significant Au Ra population.