You don't even need to hit that many ships either.

Despite there being way less than 1 successful attack per week [1] travel through the Red Sea is down from ~500/week to ~200/week [2].

[1]: https://en.wikipedia.org/wiki/Houthi_attacks_on_commercial_v...

[2]: https://en.wikipedia.org/wiki/Red_Sea_crisis#Houthi_attacks_...

Passing the strait is effectively playing Russian Roulette, where Iranian missiles are the bullets.