There is some wisdom to what you said, but as I think about it, we can find out that people such as Oscar Wilde converted to Christianity based on some evidence, otherwise how do we know that the conversion actually happened?
By the same token we can certainly deduce (although not 100%) whether Steve Jobs accepted the Saviour.
We certainly know Oscar Wilde was reconciled to the Catholic Church just before his death. Many people, including his closest friends, were gathered around his bedside as the priest heard his confession and administered the other sacraments at his request. (Technically, Wilde was not a convert, as he was baptized into the Church as an infant.)
As for the late Mr. Jobs, how could any of us know what he saw and heard in those last few seconds of life? I personally hold that the Holy Spirit reveals the truth about our merciful Lord to each man at the last moment of his life, giving each of us one last chance to see the truth and accept it. (Please note that this is my own personal belief, not a teaching of the Church, and it may be wrong.) For all we know, Mr. Jobs looked upon the face of the Lord and said “I believe”. I hope he did.
In any case, it is not for you or I to declare who is in Heaven and who isn’t. Instead of spending time thinking about whether this person or that is walking the streets of gold, I prefer to do my best to be worthy of Heaven when I die.