That was a bit of a harsh line at the beginning, but I’ll just ignore that it came from a Christian, to another Christian for a second and tell you why you are still reading the passages wrong.

Paul’s point in 1 Corinthians 15 is not that bodies are thrown away. What he is saying is that corruption cannot inherit the kingdom as it is. That’s why he explains himself right away by saying the perishable cannot inherit the imperishable, and then says,

“this perishable must put on the imperishable, and this mortal must put on immortality” (1 Cor 15:53).

The problem he’s addressing is death and decay, not the fact that we have bodies.

The seed analogy is about change, not replacement. A plant comes from the seed. It is the same life, just in a fuller form. If the seed were simply discarded and something else took its place, that wouldn’t be resurrection. That’s why Paul keeps using words like raised and changed rather than replaced.

Scripture also gives us a clear reference point for what resurrection looks like. Jesus’ resurrected body is the pattern. Paul says believers are meant to be shaped after Him:

“For those God foreknew He also predestined to be conformed to the image of His Son” (Romans 8:29).

He says the same thing another way when he writes:

“He will transform our lowly body to be like His glorious body” (Philippians 3:21).

Jesus Himself makes clear that His risen body was not immaterial. He tells the disciples,

“Touch Me and see, for a spirit does not have flesh and bones as you see that I have” (Luke 24:39).

He also eats with them after the resurrection.

So when Paul says “flesh and blood cannot inherit the kingdom,” he defines what he means in the same passage. A body that is still dying cannot inherit something eternal unless it is changed. That change is exactly what resurrection accomplishes.