"As is the earthy, such are they also that are earthy: and
as is the heavenly, such are they also that are heavenly.
And as we have borne the image of the earthy, we shall also
bear the image of the heavenly.
Now this I say, brethren, that
flesh and blood cannot inherit the kingdom of God;
neither doth corruption inherit incorruption" (1Co 15:48-50 AV, my emphasis).
Tell me, what is your problem?
I think it would only be a problem to a person who doesn't realize that the word "flesh" is used in different ways in the NT.
For instance, Jesus assures His Apostles, after the resurrection, that he is not a "ghost," because he has flesh and bones, hands and feet, etc. Obviously Jesus is not excluded from the Kingdom of God; therefore the words are being used in different senses.