Unemployment For under 18 Year old high school graduates

The law in the sexual offences act of jamaica states that 16 year olds are consented to have sex. therefore why cant a 16 year old be employed full time after high school providin that they have the qualifications. Suppose that 16 year old were to get pregnant or get someone pregnant. they would need a means of providing for that child. But according to the law they can have children but they cannot work to take care of those children or that child.