My personal thoughts on this, is that 1) not every animal will react the same way every time you pull the trigger. And 2) most of the so-called "professionals" are not the greatest shots...But they look good on TV, and are personable, and can sell you all the bullcrap hunting stuff you'll never need. So they are there to mainly sell you on stupid random hunting products, more-so than they are there to shoot animals that have been let out of cages or chip-monitored by guides for years.
I've been hunting my whole life, but personally, I'm not a fan of hunting shows anymore. It used to be mostly hunting back in the day, but now-days they're just one giant infomercial trying to get you to buy crap that they get kick-backs from.