Right off the bat, the author misstates what the RCC teaching on purgatory really is. This is simply not true. From the article above the author quotes the Catechism....
The Catechism of the Catholic Church defines purgatory as a "purification, so as to achieve the holiness necessary to enter the joy of heaven," and is for those who are said to be going to heaven but are nevertheless "still imperfectly purified." (CCC 1030) According to the Catholic Encyclopedia, purgatory is "a place or condition of temporal punishment" for a Christian after death. The punishment and purification process in purgatory is said to "purge" away certain sins that still require cleansing.
If you have any doubts about this definition then you can check the
Catholic Encyclopedia Please note what the Catholic Encyclopedia states:
Purgatory (Lat., "purgare", to make clean, to purify) in accordance with Catholic teaching is a place or condition of temporal punishment for those who, departing this life in God's grace, are, not entirely free from venial faults, or have not fully paid the satisfaction due to their transgressions..
In other words, Christ death was not enough to satisfy sin. This, of course, is heresy.
Apparently you're uncomfortable with this definition.