Yes true. Many products have the kosher symbol on the back at the end of the list of ingredients. And if you are looking at THREE panels and you choose to only scan one of them, then you are either irresponsible or ignorant and possibly shouldn’t be shopping on your own.
You have no idea if Rabbi Genack agrees with me or not. Maybe he also knows that some people are idiots and his job is to make sure they are supported. Parents do it all the time. The fact that he is making things easier for them based on the fact that they err, does not mean he isn’t laughing in his sleeve.