Why do underclassmen commit early?
Short answer: The offer will go to somebody else.
Baseball gets knocked for having a 40 rd draft. Baseball is also the only sport where there are 40 rounds worth of qualified players.
For every story about a recruiting nightmare and NLIs being pulled there are 14 other kids in a recruiting class who made it to campus perfectly fine. Now what happens once they show up is a different story, but the idea that if you commit early you're going to get screwed is all just words.
2019 committed as a sophomore. Coach sat him down and said if you don't want to come here, what are you doing on this visit. We visited on a Saturday, they offered and said he could think on it for as long as he wanted. But the following Sunday he would have another kid in that chair giving him the same offer and they were not two separate offers. That's not why he ended up committing, it was a great offer and a good fit, but moral of the story - you're replaceable. And easily replaceable.