People pay for access to eyeballs. And, right now, there are still more TV eyeballs, per ad, than internet eyeballs. , and this is especially true for shows that televise during 7pm-10pm et on M-Th
Also, there is a concept called "buyer perception"...it means that so long as the buyer THINKS they're getting their money's worth, they'll pay the price. Regardless of any information showing otherwise. The same reason people pay more for a Michael Kors handbag or Michael Jordan shoes. Perception will always beat actual value when "how you look" is the product.
Advertising is all about "how you look"