That’s exactly the point.
For the kids that are too young; the parents will notice it. For the ones who are old enough to read and don’t need it, they’ll carry on as they were. For the ones who need to talk, it’ll start conversations.
I’ll acknowledge the couple of parents here who said they don’t those conversations started again; but also say that I wouldn’t want to be relying on schools to have a chat like this in a decent way, most won’t. And you may be already having them, but if this prompts more discussion, that’s a needed conversation.
Anything that potentially lowers suicide numbers is a good thing. Everyone else will ignore it anyway. It’s really important that children learn how to regulate their emotions in childhood. Just look at all the damage that has been done by kids growing up masking it all, and then having access to anything they could think of on the internet.