I easily consumed over a pack a day of liquorice without problems for a long time, and already had heart issues.
My blood pressure when I stopped taking it didn't change a dim; medicines and diet helped, as did eating less salty/fat meals and reducing alcohol.
Well yes, 200 grams every day is different from a kilogram every now and then. I'm not saying that you can't get into trouble with licorice, you're just reasonably unlikely to, and the claim that "a few pieces a day" is the limit is just asinine.