Eph 4:11-13

And He gave some as apostles, and some as prophets, and some as evangelists, and some as pastors and teachers,

for the equipping of the saints for the work of service, to the building up of the body of Christ;

until we all attain to the unity of the faith, and of the knowledge of the Son of God, to a mature man, to the measure of the stature which belongs to the fullness of Christ.

There is a reason.
This is the design and structure of the Lord.
Most of the Body of Christ rejects the governmental structure the Lord gave for His church…then they wonder why they have the problems they do.

These are given…
for the equipping of the saints for the work of service…service of the Kingdom
to the building up of the Body of Christ

They are to function until…
we all attain to the unity of the faith
we all attain to the knowledge of the Son of God
we are all mature
we all attain to the measure of the stature which belongs to the fullness of Christ

Until we attain the fullness of Christ.

This is yet to be.
This is the reason that all are still viable and greatly needed today.

Do not reject the design of the Lord.
Embrace it.
Apply it.
Live within it.
Watch the Spirit do what He desires.