Going to add that there are only 13 states where underage marriage is actually banned, and that all of those bans are fairly recent.
Delaware (2018), New Jersey (2018), Pennsylvania (2020), Minnesota (2020), Rhode Island (2021), New York (2021), Massachusetts (2022), Vermont (2023), Connecticut (2023), Michigan (2023), Washington (2024), Virginia (2024) and New Hampshire (2024)
Who'd have thought banning sex ed in schools would result in unsafe sex amongst teens!?