True but some paths are going to be rougher than others but everyone called 'flesh' is going to be alive on the new earth. Men arrive after the GWT in New Jerusalem, all the other flesh that has lived on this earth will be 'healed' the same as the Dead Sea is for the 1,000 year reign. All in all it means the sparrows mentioned in the NT will also have eternal life.

Isa:60:22:
A little one shall become a thousand,
and a small one a strong nation:
I the LORD will hasten it in his time.

1Co:15:39:
All flesh is not the same flesh:
but there is one kind of flesh of men,
another flesh of beasts,
another of fishes,
and another of birds.

Lu:3:6:
And all flesh shall see the salvation of God.

M't:10:29:
Are not two sparrows sold for a farthing?
and one of them shall not fall on the ground without your Father.
M't:10:31:
Fear ye not therefore,
ye are of more value than many sparrows.