Sql Alchemy can't cast jsonb to boolean

I have the following value I'm pulling from a model, and trying to cast to a boolean. However, when I run the program I get an error stating `can't cast jsonb type to boolean. The value for the jsonb value here is a boolean, so why can't it cast it? What do I need to change?

The data value that I'm trying to get is the boolean out of {"unsubscribe" : "True"}

Here is the line that causes the error.

args.append(Customer.data['unsubscribed'].cast(sqlalchemy.Boolean) == "{}".format(True))

Here is the customer model

class Customer(Base):
    __tablename__ = 'customers'
    id = Column(UUID, primary_key=True, server_default='uuid_generate_v4()')
    phone_number = Column(String)
    data = Column(JSONB)
    created_at = Column(DateTime, server_default='NOW()')
    updated_at = Column(DateTime, server_default='NOW()')

    @property
    def agent_number(self):
        return self.data["agent"]["phoneNumber"]

    def __repr__(self):
        return '<Customer(id={}, phone_number={}, data={}, created_at={}, updated_at={})>'.format(
            self.id,
            self.phone_number,
            self.data,
            self.created_at,
            self.updated_at
        )