Hellrider, consider the following: (1) John 14:19 A little longer and the world will behold me no more, but YOU will behold me, because I live and YOU will live (2) Acts 1:9 And after he had said these things, while they were looking on, he was lifted up and a cloud caught him up from their vision. 10 And as they were gazing into the sky while he was on his way, also, look! two men in white garments stood alongside them, 11 and they said: "Men of Gal´i·lee, why do YOU stand looking into the sky? This Jesus who was received up from YOU into the sky will come thus in the same manner as YOU have beheld him going into the sky."
Here is the WTS' reasoning that Jesus' return will be (was) invisible:
What
is indicated by "clouds"? Invisibility. When an airplane is in a thick cloud or above the clouds, people on the ground usually cannot see it, although they may hear the roar of the engines. Jehovah told Moses: "I am coming to you in a dark cloud." Moses did not see God, but that cloud indicated Jehovah’s invisible presence. (Ex. 19:9; see also Leviticus 16:2; Numbers 11:25.) If Christ were to appear visibly in the heavens, it is obvious that not "every eye" would see him. If he appeared over Australia, for example, he would not be visible in Europe, Africa, and the Americas, would he?
In
what sense will ‘every eye see him’? They will discern from events on earth that he is invisibly present. Also referring to sight that is not physical, John 9:41 reports: "Jesus said to [the Pharisees]: ‘If you were blind, you would have no sin. But now you say, "We see." Your sin remains.’" (Compare Romans 1:20.) Following Christ’s return, some persons show faith; they recognize the sign of his presence. Others reject the evidence, but when Christ goes into action as God’s executioner of the wicked, even they will discern from the manifestation of his power that the destruction is not from men but from heaven. They will know what is happening because they were warned in advance. Because of what is overtaking them, they will "beat themselves in grief."
Who
are "those who pierced him"? Literally, Roman soldiers did this at the time of Jesus’ execution. But they have long been dead. So this must refer to people who similarly mistreat, or ‘pierce,’ Christ’s true followers during "the last days."—Matt. 25:40, 45.
Can
it really be said that a person has ‘come’ or that he is ‘present’ if he is not visible?The apostle Paul spoke of his being "absent in body but present in spirit" with the congregation in Corinth.—1 Cor. 5:3.
Jehovah spoke of his ‘going down’ to confuse the language of the builders of the tower of Babel. (Gen. 11:7) He also said that he would "go down" to deliver Israel from bondage to Egypt. And God assured Moses, "My own person will go along" to lead Israel to the Promised Land. (Ex. 3:8; 33:14) But no human ever saw God.—Ex. 33:20; John 1:18
Not saying they're correct but it is food for thought..