People of conscience recognize that "all fall short of the glory of God" and that none of us is without sin, not one. Recognizing this is the basis of compassion for the struggles of others with sin. If you have never struggled to overcome any sins, congratulations. Heretofore I had learned that there was only ever one perfect Person.
You asked. “What makes you think they haven’t, or didn’t struggle with their decision at the time?”
I answered your question. Deal with it.