How about Christians who don't struggle with their sins, and who, rather, call their sins not sin?
There are no such people. If they call their sins "not sin" then they haven't repented. (So these people you refer to are not Christians.)
“How about Christians who don’t struggle with their sins, and who, rather, call their sins not sin? “
The church is full of people who justify their sin. They may call greed and lust for money “success” or “blessings” or “God’s harvest”. I’m sure Joyce Meyer can justify her wealth and extravagance just as easily as a gay person can justify their adultery.
The question is : Which one is struggling with sin and which one celebrates it?