For the record, on our very first visit to Turkey we booked a visit to Pammukkle and Ephesus through our tour operator.
And us too! Nothing wrong with using tour operators for trips, especially when you are new to a country or particular area. I agree too that you often get much more information from a local guide who knows the area well than reading guide books. It's not just about being led around by the nose! Books can't always answer your questions!
It's easy to criticise people who don't yet feel brave enough to go off on their own in a new place when it's somewhere you've been visiting several times a year for donkey's years and know it almost like your own home town.
One of our stopovers on the way home from NZ in April was Hong Kong. We'd never been there before and didn't even know where to start sightseeing, despite all the maps and books we had. But fortunately there was a travel agent with an office in our hotel so we booked a half day trip round HK island. It was brilliant! A young lady was our guide, she'd lived there all her life. Never stopped talking about HK, was very amusing and entertaining. We were taken all round the island, had a ride in a sampan, saw so many places we just wouldn't have got to on our own. Well worth what we paid.
I don't like AI's for several reasons, one being that so many people just never leave the complex and many don't want to, and if they want to spend their money doing that then that's their business and it is a shame that they don't see any of the area where they are staying. But if they do venture out they may just get a feel for the place and decide on a next trip they they will see a bit more.