More of a "free" like in "you are free to behave immorally"

That principle exists in a domain where you've already been alleged of wrongdoing established by a given set of laws, it just means the allegation isn't also the warrant for guilt, as in a witch trial. It wasn't meant to hand-waive away any kind of collective speculative concern

The open letter cites plenty of sources explaining why the product would be harmful to children. Convictions are made on less evidence than this.