To run a debate with Trump and without live fact checking was just plain stupid. You know he’s just going to run his rehearsed talking points without so much as trying to answer even mildly uncomfortable questions. They not only let him get away with serial lying, they basically laid the groundwork so he could get away with it.
Fact checks after the fact never reach the people that need to see them.
‘Calling out lies’ isn’t fact-checking - at best it would have turned into a ‘your word against mine, who will people believe’ mudslinging contest. Fact-checking puts the onus on the person telling the lie to correct it - ‘this is false and here is a source that says so’.