If there's a zealous mindset here, I see it coming from this comment.

It's significantly easier to use a 24-hour clock and get rid of AM and PM. In fact, it's so easy to use 24 hours that I use it exclusively for my internal time, and I do commonly get confused by times like 12AM - is it day or night? It has a 12 instead of a 0, somewhat confusing.

I also refuse that the metric system is more difficult for human scale measurements. Ever since I switched, I have had a stronger fundamental connection to the units, and I can visualize the world better. It's significantly easier, and I would call it MORE human oriented.