The swearing of an oath is symbolic. If it's required by law they're still legally required to do it.
Actually, it is not symbolic but a serious mark, based on Scripture, to bind people to their promises.
Swearing an oath was taken very seriously by our Founders. It was known at the time that it was an act that called down blessings or curses depending on the demeanor of the swearer.
This is why the libs have been so happy to get rid of the "so help me God" part.
Sadly, we have lost the collective understanding of what our Founders did for us regarding oaths.
When George Washington instituted the solemn presidential oath he understood that when he raised his hand and swore to protect and defend the Constitution, he was actually asking God to witness his words. That is a very serious thing to do because God cannot be witness to a lie, and when a person taking such an oath calls on God he better make dang sure he is telling the truth or else he immediately brings down curses upon his head.
So, for Obama to change an oath means one thing for sure - he knows exactly that he is giving God the middle finger through oaths.
Obama cursed himself every time he took his oath, even the mistakes that needed to be repeated.