Purgatory is a purification time. A purging away of all the harm we did to others while we were alive and didn’t offer the reparation to them.
So it’s salvation through works now?
6 Therefore we are always confident, knowing that, whilst we are at home in the body, we are absent from the Lord:
7 (For we walk by faith, not by sight:)
8 We are confident, I say, and willing rather to be absent from the body, and to be present with the Lord.
And this one which no one can get around:
Hebrews 9:27 And as it is appointed unto men once to die, but after this the judgment: