I know. But you would think they would do basic research.
Research? What is this bizarre concept?
As others have already said, it's set in the futuree so it's easy to get around the fact that it's different from how it looks today.
Broadly speaking, issues about research (or lack thereof) come up when dealing with contempary or historical settings. If you want an example from TNG how about "The Royale" which gives a tempature below absolute zero. It's almost as if when goiung through the rewritting process someone changed degrees F to degrees C.