It is more nuanced. Illinois at least you can petition the court after acquittal for a "certificate of innocence" which you can use to gain some small statutory compensation. I assume other states have this.
Also, many county jails charge bed fees even if the case is dismissed and you never go to trial. These bed fees have been ruled legal many times by courts.
And, as a final kicker, the 13th Amendment isn't as clear as the text makes out. The US Supreme Court has carved exceptions out for small amounts of slavery. For instance, the government is allowed to force pre-trial detainees who are unconvicted to do cleaning jobs and it does not violate the 13th Amend.
Also, many county jails charge bed fees even if the case is dismissed and you never go to trial. These bed fees have been ruled legal many times by courts.
And, as a final kicker, the 13th Amendment isn't as clear as the text makes out. The US Supreme Court has carved exceptions out for small amounts of slavery. For instance, the government is allowed to force pre-trial detainees who are unconvicted to do cleaning jobs and it does not violate the 13th Amend.
Source: 10 years a slave.