I’d explained this to her but she told me it was just because I wasn’t used to it, then made a big song and dance about doing it in full view, drawing attention to herself in the process.
No, you made a big song and dance about it.
For future reference- avert your eyes, or if you’re that squeamish, you politely leave the table, as it is you that has a problem.
I think this attitude is symptomatic of a modern society where everyone is hell-bent on exercising their “rights” without a second thought to their responsibilities or other people’s feelings.
Ironically, this is exactly what you’re doing by making people with a medical issue feel like freaks. Why do you think you have a right to object to someone else going about their life? What else should be shut away because it might be offensive to someone?