Open Credit
When coders use the GNU Public Licence, they have no obligation to give anyone credit for anything.1 Despite this, coders almost always receive credit for everything they do, down to the exact line-changes.2
Meanwhile, the Creative Commons licences - far more popular with artists - have explicit stipulations, but don't have the same shining record of every contributor receiving credit for their exact work, or receiving any at all.
The difference is the tool. If you want to give proper credit to an artist, you have to take special pains. You need to make sure they've put the proper licence on their work (not just 'this is CC') and that you have their name right, and that any assets they've used also have all of those licences handled properly.
Meanwhile, if you want to remove a coder's credit, you have to take painful steps messing about with the git history.
As ever, protocols are stronger than laws.