Now if he were on earth, he would not be a priest, since there are already priests who offer the gifts prescribed by the law.

For every high priest is taken from among the people and appointed to represent them before God, to offer both gifts and sacrifices for sins.

For every high priest is appointed to offer both gifts and sacrifices. So this one too had to have something to offer.

This was a symbol for the time then present, when gifts and sacrifices were offered that could not perfect the conscience of the worshiper.