Any host that allows an 'Emperor's new clothes' approach, allowing his or her guest to spew idiocies without being reined in to reality leaves me cold. Unfortunately, these hosts' gigs would probably be short-lived, as they would have extreme trouble obtaining guests.
When stars had to struggle for decades to hone his or her craft, the result was a mature, introspective and intelligent interview when these celebrities were on late-night TV. Now, we don't have that luxury, especially when you can become 'famous' literally overnight on the internet, and the shows that troll for these so-called celebrities. In the past, they clearly weren't ready for prime time...or any time. Just another result of our 'I wanted it yesterday' culture.