Does Impaling Do More Damage to Players?

The Minecraft wiki says that Impaling deals more damage to both players and underwater mobs, but when I tested this on my friend, it turns out Impaling doesn't deal any additional damage to players.

Does Impaling increase damage?

The Impaling enchantment increases your attack damage against sea creature mobs such as guardians, elder guardians, squids, dolphins, and turtles. ... The maximum level for the Impaling enchantment is Level 5. This means that you can enchant a trident with up to Impaling V.

How much more damage does Impaling add?

Increases melee damage against aquatic mobs. Adds 2.5 (half heart) extra damage for each additional level.