That's the problem with Etsy. They have many rules, but some of them are nowhere to be found. The only reason one would know they were there is when some moderator mentions them in the public forum. But then another moderator explains the opposite.
In fact, back in the first years we would communicate directly with the four Etsy founders (and still the only four employees, imagine that) in the public forums and they would explain the rules to us. They probably weren't even written down then. And less then 2% of Etsy members visited the forums....
So yes, in the past Etsy told us in the public forums (which I don't visit any more) that this info should be added to our shop announcement too.
Yet obviously that rule is nowhere to be found (anymore?).
So that is where that confusion comes from.
Etsy loves confusing their customers. In fact, Etsy admins themselves are very confused about the rules too.
Yet it doesn't seem hard for me to make up site rules and then stick to them and force your customers to stick to the rules too.
But that is not the way Etsy does business.
I did look in your shop announcement, with that old rule (that might or might not have existed) in mind. So, again, sorry for missing the info that, according to the new rule (?), is in the right place.