That has nothing to do with First Age elves being inordinate risk takers. It means Galadriel specifically has revenge on her mind. I don’t think pushing her men equates to jumping off a ship a thousand miles at sea, and certainly doesn’t follow your statement of Elves from this time period being crazy.

Have a character say “I don’t trust those First Age elves, they’re always taking stupid risks and don’t think their decisions through”. Show one doing something stupid, like that one black elf, and have a human go “wow, those First Age elves do really impulsive things with no regard to their or others’ safety!”

I’m being blunt lol but my point is that there are ways you can setup a character’s actions prior to them doing something, and this should happen if the audience won’t have prior knowledge of what these characters are like.

The text should inform the audience (who largely won’t be Tolkien experts) that this is something a First Age elf would do. The way it looks in the show comes off silly to an average viewer.