The point is that the Church is his vehicle to share the Gospel to the world. The Apostles are who God has chosen to work through.
Their authority stems from Christ - if Christ no longer had authority neither would they. The alternative is also true - remember what Christ said to the centurion? The centurion told Jesus- “command it and it shall be done, just like the centurion commanded his soldiers - Christ would command his disciples. “you tell them Go and it shall be done.”
Rejecting the authority of the Apostles is rejecting Christ’s authority.
Wrong. Believers are the vehicle through whom God has chosen to share the gospel through.
2 Corinthians 5:17-21 17 Therefore, if anyone is in Christ, he is a new creation. The old has passed away; behold, the new has come. 18 All this is from God, who through Christ reconciled us to himself and gave us the ministry of reconciliation; 19 that is, in Christ God was reconciling the world to himself, not counting their trespasses against them, and entrusting to us the message of reconciliation. 20 Therefore, we are ambassadors for Christ, God making his appeal through us. We implore you on behalf of Christ, be reconciled to God. 21 For our sake he made him to be sin who knew no sin, so that in him we might become the righteousness of God.
What? The apostles only?
Have you never studied the NT concept of "the priesthood of all believers?"
Revelation 1:4,6: To the seven churches in the province of Asia...6 and has made US to be a kingdom and PRIESTS to serve his God and Father...
Peter didn't limit the "priesthood"...just the opposite:
4 As you come to him, the living Stone—rejected by humans but chosen by God and precious to him— 5 YOU you also, like living stones, are being built into a spiritual house to be a holy priesthood, offering spiritual sacrifices acceptable to God through Jesus Christ. ...9 But you are a chosen PEOPLE, A ROYAL PRIESTHOOD, A HOLY NATION, God’s special possession, that you may declare the praises of him who called you out of darkness into his wonderful light. 10 Once you were not a people, but now you are the people of God; once you had not received mercy, but now you have received mercy. (1 Peter 2:4-5, 9-10)
Since God's people are now collectively corporately indwelled by the Holy Spirit, He works thru a LOT more people than many want to promote.
Even all the major lay movements within Catholicism have been emphasizing that over the past 75 years!