No disrespect taken. We know not everyone loves the silly side commentary, but IMO that's just part of Rick's schtick to make travel feel approachable and not too serious. Comments we've received have been wide ranging. I admit to having a few eye-roll moments in front of the Acropolis with the app, but the other 98% of it is what you're there (listening) for.
"I just assumed she is an AI." You give us far too much credit to have developed or paid for a high-quality AI voice. ;) I think Rick refers to her (and possibly himself too) as a virtual travel buddy in that she's not personally there with you. The app - and the narrators within (Rick and Lisa) - is the virtual companion.
Fyi, the audio tours are all derived from the guidebook versions (and there are far more in the guidebooks). The guidebooks don't have the side commentary. You may prefer the written versions! Of course, the guidebooks aren't free, but are also a drop in the bucket vs trip cost. Everything has pros and cons! ;)