I have only taken a guided tourist tour once (once!) in my life. It was in Mallorca with my in-laws, my wife and my son.
We got on a completely overcrowded bus and were taken to a village where we were supposed to visit the “native” market. The first thing was that the air conditioning on the bus wasn't working. Ok, let's say this is something "native". But not fun at 35°C and 60 people inside the bus.
Then, an unknown white smoke suddenly came from the air conditioner, so we had to stop in the middle of nowhere, with no shade anywhere, and get off the bus. After a while the smoke cleared and we got back on the bus, but the brakes were stuck and didn't seem to open. With a lot of engine revs, the bus driver finally managed to generate enough compressed air to release the brakes, and okay, let's call that a bit "native" as well.
And so we finally arrived at the “native” market. There were lots of plastic gadgets to buy and everything you would expect from such rip-off events. Even Rolexs for 20€ ("original copies", as the black men told us). But my hope of finding good wine, cheese and ham quickly disappeared.
An annoying, wasted day. Lessons learned: Don't rely on "organized adventures" and do it yourself.