Romans 14:4 Who are you to judge someone else’s servant? To their own master, servants stand or fall. And they will stand, for the Lord is able to make them stand.
Have you ever gone up to someone and said something like “you cannot do it that way!” only to find out that is how they have always done it?
We learn from the people around us and what we learn tends to stick with us; just because we do something in a different manner does not necessarily make it right.
God is our overall judge and it is to Him we should be trying our best to do things right by. Don’t get caught up in arguments about how things are done unless you want to argue with God!