Every devout Christian at my gym and every one that I've ever trained with takes those fasts just as seriously as Muslim fighters take theirs, I've had numbers of both in multiple gyms (i have never trained with a Hindu, found their fast online.)
The issue isn't isn't that Christian or Hindu fighters aren't talking about these fasts, it's that they aren't using them as built in excuses.
Precisely this. They can't handle the truth.
I didn't say anything about Islam or Shavkat, as neither of them loudly and foolishly proclaimed they'd take a fight at 300 months beforehand. They didn't duck anyone. Ankalaev most certainly ducked Poatan at 300 because it was short notice, and Ramadan was the excuse.