Look at 1Co 15 and you will see that Paul's usage there and elsewhere of "flesh and blood" means the natural, sinful, weak, corruptible body, which cannot inherit the kingdom of heaven.
Likewise, his usage of "spiritual" there and everywhere never means non-material, non-physical spirits.
It means the physical body transformed into a glorious, sinless, incorruptible physical body fit to inherit the kingdom of heaven.
Our resurrection spiritual (of the Holy Spirit) bodies are physical just as Jesus' resurrection body is.
And our natural physical bodies are not an impediment to eternal life (Holy Spirit life) in our reborn spirits.