Yeah...
Them Bad Popes changed a LOT of 'human law'.
Why do you Catholics ALLOW 'human law' to infiltrate your beloved church in the first place?
Does your church have some schedule of services? What hours, and what days? Some rule on whether the Lord's Day will be observed on Saturday (the Biblical Sabbath) or on Sunday (the day of the Lord's resurrection?)
Some procedure for choosing pastors, some regulations? (Women, or no women? Some age qualification? Some doctrinal qualification?)
Some regulation on who can participate, and when? Do you disfellowship, shun or exclude unrepentant public sinners? Do you have a way to reconcile them if they repent and want to come back?
A ruling on whether you'd baptize somebody as an infant? A 4 year old? An 11 year old? Or just adults? Who decides?)
Do you observe the Lord's Supper? Do you have regulations on who can partake? Infants? Toddlers? Unbaptized people, or only baptized?
Is there a church building, and a plot of land it sits on? Who owns that? The pastor as his personal property? An incorporated religious nonprofit? Is there a board of directors of some kind? Trustees? Elders? Deacons? Are there papers of incorporation?
I'm asking all these things, not because I'm preparing a dossier on "Elsie and Her Church", but because these are a few of the sorts of matters covered by Canon Law.