Looking at their website, "denis bider" is not just "support" but the main person beyond Bitvise, FYI. He also seems to think that "Biological viruses are made up. Virology is a fake field of study. [..] Virology, like journalism, is where an entire field is fraudulent".[1] When you're so triggered having to wear a mask for public safety you just start dismissing entire fields of science that don't fit your ideology and offend you ¯\_(ツ)_/¯
It's no surprise the reasoning in that email is so bizarre and barely connects to the actual question. It's just this person's personality.
[1]: https://web.archive.org/web/20250417152336/https://blog.deni...