The answer is “OK.” If someone wants to take under one species or both species, that’s their business. For someone who’s not even Catholic— it’s all academic anyways, up there with, “If I ever won the lottery…” or “If you could go anywhere in the world…”
In my old city, I had been part of a group that met at a FSSP priest’s house for a series of lectures about the history/symbolism/words/actions/etc of the Tridentine Mass. At the end of it, we’d have a few snacks and chat.
I remember one evening, in the conversation after the lecture, the priest was making jokes about how disgusting and germy it was for the congregation to drink from a common chalice, and backwash in the Blood, and whatever. And since one of my devotions is to the Precious Blood— that one really annoyed me to hear a priest talking like that about it.

I didn’t say anything, but it did affect the way I perceived him from then on.
I remember in the 80’s, I went to a parish that only allowed the congregation to receive under a single species. So I’ve always been grateful that I have the opportunity to receive under both-- and a little sad when it gets taken away during flu season.
But everyone’s entitled to their opinion… and everybody’s got one… and then everyone has to deal with the rules of reality.
