They aren’t worried in the literal you, in one sense.

Advertising is a temporal numbers game. Any one random single individual (or household) at any given time is insignificant. You are a speck of dust in the wind.

On the flip side, advertising is (or can be) a long game. At the moment you may be too young, too poor, too healthy, too whatever for their ads to be relevant. However, if they advertise enough and you see enough of these ads, it can make an impression (even if subliminal). And down the line when you’re old enough to need dick pills and making just enough to afford them, you’re now aware that dick pills exist and suddenly now that you’re in the market for dick pills your reptilian brain will remember that jingle “Like a rock” and how Dicken’s dick pills are the key to feeling 18 again. Suddenly you’re sucking down Dicken’s pills like they’re candy.