Why does it come across as "off" to you? Whatever interest people have change all the time, or the field they initially entered isn't what they thought it was. I also don't see why you think liberal arts to a more "useful" degree is the only legit path.

I've seen all types of changes and there is no reason a person should be stuck in a path they are not happy with just because they picked a different major when they were in college. Some ex: Comp Sci to med school, Neurosci Phd dropout who works in animation, chemical engineer who decided to get a MFA, there are countless examples.