I thought sloth was just laziness

From Wiipedia:

"It is the most difficult sin to define and credit as sin, since it refers to an assortment of ideas, dating from antiquity and including mental, spiritual, pathological, and conditional states.[1] One definition is a habitual disinclination to exertion, or laziness.

The word "sloth" is a translation of the Latin term acedia (Middle English, acciditties) and means "without care". Spiritually, acedia first referred to an affliction to women, religious persons, wherein they became indifferent to their duties and obligations to God. Mentally, acedia has a number of distinctive components of which the most important is affectlessness, a lack of any feeling about self or others, a mind-state that gives rise to boredom, rancor, apathy, and a passive, inert, or sluggish mentation. Physically, acedia is fundamentally a cessation of motion and an indifference to work; it finds expression in [sloth can also be referred as Laziness], idleness, and indolence."

So it's indifference to physical work (he chose an easy way to make money), but also an apathy towards the world (he didn't care he hurt children with his sexually abuse).

That's a good question.

I looked up the wiki article the other poster cited and it now makes sense.

For me, the fat guy represents sloth, which to me means laziness. However, the classical definition is apathy towards duty to others. So, religious leaders who stopped caring about the community exhibited sloth.

So, a drug dealer and pedo is not practicing "civic duty" because they are okay spreading addiction and trauma. But, that's more than sloth because sloth meant not caring or helping whereas actively hurting people is more sinister.

The writers were doing the best they could, I guess.