You might doubt that God would want to “resurrect some rotten, decaying body unnecessarily”, but Jesus was the one who taught the people about the resurrection of the dead. At one point, some of the Sadducees approached Him in the temple. They didn’t believe in the resurrection, either. So, they wanted to trick him with a hypothetical question about seven brothers who all had the same wife, and each one of them died.
[34]"Luke 20:33 In the resurrection therefore, whose wife of them shall she be? For all the seven had her to wife.[34] And Jesus said to them: The children of this world marry, and are given in marriage: [35] But they that shall be accounted worthy of that world, and of the resurrection from the dead, shall neither be married, nor take wives.If Jesus was not speaking of all people being resurrected, then what was He talking about, here?
[36]Neither can they die any more: for they are equal to the angels, and are the children of God, being the children of the resurrection. [37] Now that the dead rise again, Moses also shewed, at the bush, when he called the Lord, The God of Abraham, and the God of Isaac, and the God of Jacob; [38] For he is not the God of the dead, but of the living: for all live to him."Jesus was clearly referring to all who would be saved through Him, would also be resurrected and live, never to die again. All the souls that have ever lived, including Moses, Isaac, and Abraham, are awaiting the resurrection of the dead, for their souls to be reunited with their bodies.
So, the question to you remains, which of your ‘bodies’ would be resurrected if you think you are ‘reincarnated’ many times, yet only possess one soul? This is why it makes no sense for you to believe in Jesus Christ, if you also choose to believe in reincarnation, because those two belief systems are completely incompatible.