I don’t know about that. He did not “demand” his piece. And he did not say “Lego owes it to me”, like the voters in the last election did.
Even if he didn’t “demand” a replacement piece I think the proper request before asking for something from a company is to offer to pay for it. Of course the boy is only 7 and obviously it was the dad who encouraged him to ask for a replacement without offering to pay for it. We have a full blooming tree of entitlement planted squarely in the middle of our country because we ignored it when it was a small seedling and we “felt” good about giving people free stuff.