No. You assume nobody can walk uprightly with God when such is not the case. The 144,000 were said to be without fault before the throne of God. In context, it mentions their good deeds like: how they were virgins, there was no guile found in their mouths, etc.
Revelation 14:
3 "And they sung as it were a new song before the throne, and before the four beasts, and the elders: and no man could learn that song but the hundred and forty and four thousand, which were redeemed from the earth.
4 These are they which were not defiled with women; for they are virgins. These are they which follow the Lamb whithersoever he goeth. These were redeemed from among men, being the firstfruits unto God and to the Lamb.
5 And in their mouth was found no guile: for they are without fault before the throne of God."
Jesus gives us victory not only on the cross by forgiving us of our past sins, but He gives us victory over grievous sin in this life.
"But put ye on the Lord Jesus Christ, and make not provision for the flesh, to
fulfil the lusts
thereof." (Romans 13:14).
"For this purpose the Son of God was manifested, that he might destroy the works of the devil." (1 John 3:8).
"For if ye live after the flesh, ye shall die: but if ye through the Spirit do mortify the deeds of the body, ye shall live. " (Romans 8:13).