With AirBnB, you can pretty quickly assess the quality and safety of the apartment or room by reading about the local area, looking at photos of the apartment, checking for e.g. smoke detectors upon arrival, etc. If there's a problem with the apartment that the photos don't show, like mould or a terrible smell, you can pick up on this very quickly after arrival and leave to find somewhere else.

With Uber, I can check the car has seat belts before we depart, see if there are any big dents in the chassis, etc. If the driver is driving erraticly, I can ask them to stop the car and I can leave.

With a sharing-economy-restaurant, there's no way for me to assess how safe the food is to eat. Is this person's fridge at a safe temperature? Do they use a separate cutting board for raw meat or fish? Do they regularly wash their hands? Did they try making their own chilli oil and accidentally culture botulism? Did they use some mouldy peanuts full of aflatoxin?

It's much harder to pick up on these things. The first you might know about them is two or three days later when you get sick.

These are risks with any restaurant, but with a regular restaurant they are inspected, licensed etc. I eat food prepared by my friends, but I trust my friends implicitly, and my friends aren't financially motivated so aren't incentivised to cut corners.

Call me a food safety nit, but the idea of eating food prepared by unlicensed strangers does not seem appealing.