You are misinterpreting it.Paul says they do - Galatians 5:17.
This is the plain verse you keep evading and twisting to serve your 'sinless perfection' belief.
I have no need to resuscitate the life of the now destroyed "flesh", so I see 1 Gal 5:17 from the perspective of Gal 5:16.
Walk in the Spirit and you will not fulfil the lusts of the "flesh".