It is precisely because it is the first amendment in the bill of rights, that demonstrates how highly the value is held. Any other "change" could have been first, but freedom of speech was chosen. The founders were not going to otherwise ratify the constitution without the bill of rights. I find it a bit pointless to say you are not American and vaguely know something in order to demonstrate that you understand the constitution better despite not being so, if you vaguely don't know that the constitution was not ratified without the bill of rights.