Jesus is not God, but that's a topic that we're not supposed to discuss in these forums.
Jesus didn't always tell people up front that he was going to tell them a parable - he just told a parable. The people were not so dumb as to not realise that it was a parable. For example, Luke 8:4-11 (WEB):
(4) When a great multitude came together, and people from every city were coming to him, he spoke by a parable.
(5) “The farmer went out to sow his seed. As he sowed, some fell along the road, and it was trampled under foot, and the birds of the sky devoured it.
(6) Other seed fell on the rock, and as soon as it grew, it withered away, because it had no moisture.
(7) Other fell amid the thorns, and the thorns grew with it, and choked it.
(8) Other fell into the good ground, and grew, and produced one hundred times as much fruit.” As he said these things, he called out, “He who has ears to hear, let him hear!”
(9) Then his disciples asked him, “What does this parable mean?”
(10) He said, “To you it is given to know the mysteries of God’s Kingdom, but to the rest in parables; that ‘seeing they may not see, and hearing they may not understand.’
(11) Now the parable is this: The seed is the word of God.
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There is nothing said in the parable about whether either the rich man or the beggar were sinners or Christians. So why in the story do they end up in different places? Was Jesus teaching that in order to go and be with the dead Abraham after we die, we must live lives of absolute poverty? Why did Jesus tell this story/parable? The context was, Luke 16:13-16 (WEB):
(13) No servant can serve two masters, for either he will hate the one, and love the other; or else he will hold to one, and despise the other. You aren’t able to serve God and Mammon.”
(14) The Pharisees, who were lovers of money, also heard all these things, and they scoffed at him.
(15) He said to them, “You are those who justify yourselves in the sight of men, but God knows your hearts. For that which is exalted among men is an abomination in the sight of God.
(16) The law and the prophets were until John. From that time the Good News of God’s Kingdom is preached, and everyone is forcing his way into it.
The parable was told to highlight that the Pharisees' wealth and respectability would not save them, whereas the poor who heard the Good News and believed it would be saved. Barnes' Notes says:
The “design” of the narrative is to be collected from the previous conversation. He had taught the danger of the love of money Luk_16:1-2; the deceitful and treacherous nature of riches Luk_16:9-11; that what was in high esteem on earth was hateful to God Luk_16:15; that people who did not use their property aright could not be received into heaven Luk_16:11-12; that they ought to listen to Moses and the prophets Luk_16:16-17; and that it was the duty of people to show kindness to the poor. The design of the parable was to impress all these truths more vividly on the mind, and to show the Pharisees that, with all their boasted righteousness and their external correctness of character, they might be lost. Accordingly he speaks of no great fault in the rich man - no external, degrading vice - no open breach of the law; and leaves us to infer that the “mere possession of wealth” may be dangerous to the soul, and that a man surrounded with every temporal blessing may perish forever.