Aren’t these duties being carried out by our priests?

The priest is the shepherd of his parish. To think that the parish priest can meet ALL of the needs of his parish—counseling, administration, liturgical, etc. —is unrealistic and unhealthy for both the priest and his parish. Ordained members of his parish [deacon and deaconess] can help the rector carry out these pastoral and ministerial roles, which can result in a more spiritually healthy parish.