Here is where I see the contradiction. The author of the post I linked said first “other clerics may wear them” and then later said priests are “supposed to leave them in the sacristy.”
So what exactly does “may wear them” mean? Does it mean extra-liturgical only? And how explicit is the Motu Proprio? On one extreme, it might be silent, on the other extreme, it might outright prohibit priests from wearing them at Mass (or other liturgical functions). I’m curious to see exactly what Bl Paul VI actually said about it.
I’m also hesitant when I read “supposed to leave them in the sacristy.” Likewise, what does that mean exactly? Is that just the author’s personal opinion? The words “supposed to” are a bit ambiguous. That’s the sort of phrase I hear used by people who assert something that is really nothing more than personal opinion.
And let me be clear to anyone reading here: I have little interest in this topic beyond this thread. I’m not advocating priests to wear zucchettos at Mass, nor am I being critical of one who does. To me, this thread is just idle conversation. I don’t want anyone reading more into this than that.