Making a straight way means easily and quickly reaching a goal. The righteousness of the blameless makes a straight way for them. How?
The righteousness of the upright delivers them. Verse 4 says it delivers them from death. The delivery in verse 6 is from evil desires.
Jesus taught, “Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it. But small is the gate and narrow the road that leads to life, and only a few find it.” (Matthew 7:13-14)
Who is to blame? The wicked are brought down by their own wickedness. The unfaithful are trapped by their evil desires. I learn to take control of my evil desires and wicked thoughts. Like any muscle, it takes time and has pain. But after every workout, I feel better.