Yes this is true. But what do you think is the reason? Like is it because there's heavy metals in the dye, so the plate is kinda toxic? Or maybe because it's just too fragile, chips easily, etc?
As the consumer I don't know what regulatory loopholes they are exploiting when they state "decorative use". I doubt the average consumer has the time to do this research. Because a plate is a plate and people will use it to put food on when it's sold in that way, the intended usage is obvious regardless of the tiny disclaimer.
But it's not exactly a threat is it? It's a very reasonable observation about how Ukrainian refugees might feel and behave.
Wouldn't you feel the same way? Your country gets invaded, you flee to a generous supporting friendly country. That country stops being supporting, and your chances to return home start to vanish. You didn't choose to be here. Now you're stuck in a foreign country that you feel could be doing more to fight injustice and give you a chance to return home.
He's the president of a democracy, not a mind controller. People will feel a certain way. He's simply observing this potential situation, as a warning to the allies not to slide into complacency.