The erroneous conclusion is not to mean they do not have the indwelling Holy Spirit.
It means they are failing to be filled with the Spirit.
For we are never commanded to be indwelt by the Spirit. That God does in regeneration.
But, we are commanded to be filled.
"Do not get drunk on wine, which leads to debauchery.
Instead, be filled with the Spirit". Eph 5:18
That command was given to believers. To those who already had the indwelling Spirit.
Being filled is when the Holy Spirit actively affects your mind, and is controlling your sin nature.
To be in that state, one must always be ready, if need be, to quickly implement 1 John 1:9.
Grace and peace ..........