Read the CoC again: https://github.com/gleam-lang/gleam/blob/main/CODE_OF_CONDUC...
It doesn't police peoples' personal beliefs outside the community. It only says that while participating in the community you agree not to harass people and try to contribute in a positive way.
I wonder if you have past experiences that are coloring your interpretation of this, because I'm really unsure where you're getting any of this from.
Eh, the controbutor covenant thing does have a tendency to attract people that are really into culture war and internet drama.
That said, their CoC does not block anyone from merely using the language.