Paul forbids continuing in sin (Romans 6). He then describes the ongoing struggle that remains inside the believer: the desire to do good and the presence of another law at work (Romans 7). He then declares there is no condemnation for those who are in Christ Jesus (Romans 8:1). The sequence is deliberate. The struggle does not reclassify the person as never known.
The standard is real. It is not a demand for sinless perfection as the condition of remaining saved. 1 John says the same: if anyone does sin, we have an advocate (1 John 2:1–2). Genuine believers already belong to Christ. Once saved always saved. Fruit and cleaner speech are the right response to grace. They are not the condition that keeps a person in him.
I am a sinner who still sins. I am not going to pretend the struggle is gone. Readers can examine Romans 6–8. They can disagree. The claim is that the text keeps the struggle and the security in the same letter.