This all started with 1 Corinthians 15:42 “So also is the resurrection of the dead. It is sown a perishable body, it is raised an imperishable body:”
So, the context is the resurrection body, the spirit body that Paul says is imperishable. I don’t see how that relates to Adam. In fact, in 1 Corinthians 15, Paul contrasts Adam with Jesus, and in verse 46 says “However, the spiritual is not first, but the natural; then the spiritual.” Paul is not seen as a spirit that is imperishable.