“Nevertheless, I tell you the truth: it is to your advantage that I go away, for if I do not go away, the Helper will not come to you. But if I go, I will send him to you.” (John 16:7, ESV)
Why do Christians think that people had more ready access to God’s power when Jesus was on the earth, and the apostles were alive and active? It is because they are carnal. It is because they are unintelligent, unbelieving, and unspiritual people.
By faith, we have a greater access to a greater amount of divine power today than when Jesus walked the earth. By faith, we can reach the same Jesus today without needing his bodily attention. By faith, we can perform the same ministry today without needing his bodily commission.
Why? First, it is because Jesus fulfilled his mission in redeeming his people. Second, it is because Jesus fulfilled his promise in sending his Spirit. Those who teach as if we have less access and less power today unmask themselves as satanic agents against the gospel of Jesus Christ in these two defining aspects of the history of redemption.
Their doctrine means either that Jesus failed in his mission, or Jesus failed in his promise. This would in principle make them non-Christians, destined for hellfire. If we are recklessly lenient, we would at least call them super-super-STUPID. However, it seems that this anti-gospel is the opinion of the majority.