This is because you don't understand what the Piers Morgan show is for. It's not a news program, it's a program designed explicitly to humiliate experts.

Step 1: Find a well meaning, educated expert with decades of experience in their field but little media training

Step 2: invite the to debate a stand-up comedian or other highly media savvy idiot with no background in the topic at all.

Step 3: Selectively interrupt the expert at every inconvenient moment, cutting off their main arguments and reducing them to stuttering.

Step 4: Present this exchange to the audience as a fair debate in which the wonderous, childlike Everyman used his common sense to ask incisive questions and cut through the bullshit, stumping even the world's greatest experts.