I took that to mean the nuns she was referring to in the sentences prior — the ones who’s bell tower she grew up in sight of; and the in the sentences following — the ones who have a Fitch Rating.
That must be quite a convent. She may also be using "60s" to mean something different than the actual 1960s. I don't know what nuns are like now, but I didn't see much of this when I went to school a few decades ago.
I don't dispute that this may be her personal experience. And I haven't had much to do with nuns lately, so they could all be like that. But people look at nuns with different eyes now than they did decades ago and make very different assumptions.