It didn't turn out to be irrelevant for the thousands of Shia in Pakistan.
Or the Ahmedis!
I will advise you to be safe when taking a bus ride and don't carry an ID card that can identify you as a Shia, however irrelevant you think it is.
Don't worry, I'd rather be a Shia in Pakistan than a Muslim in India. Just the fact that Muslims fall under the OBC in India shows how backward they are, even worse than Dalits. In Pakistan, it is a turbulent, & everyone is suffering equally, unlike India where the non-Hindu suffers at the hands of the Hindus.
Obviously they rejected Pakistan.
Or were they illiterate downtrodden Dalits who couldn't migrate?
They are average, middle class Indians. Not very well off, but well educated. My maternal grandfather had a decent business in Bihar pre-1947, & there was uncertainty about Pakistan, so he didn't want to leave that.