Deal or no deal

I get so mad watching this show. I know it's different when you're on the show and your adrenaline is flowing, but some of these people make me want to scream. I don't know what they're thinking. The girl on the show I'm watching had 2 large cases, but only 6 cases total. She knocked out the highest case left that had 300k. They offered her 23k, but she still had 100k in play. What does she do? Pick a case of course and she knocked out the 100k. Now the highest amount she can win is 200. I know I shouldn't get so worked up over these shows but I do.