Your condo insurance may not always cover you if you're allowing homesharing or temporary tenants. Depending on your policy, it may specifically exclude them and may require you to get an endorsement/add-on.
I certainly understand your concern, but you cannot get a renters policy for an Airbnb you are temporarily residing in. If you have a renters policy for your current address, your liability coverage will cover any damage you cause to the Airbnb (up to your liability limit).
For all their homeowners, Airbnb provides Host Protection coverage that protect the contents of the house from guest damages. You will also need to get regular homeowners insurance in addition to what Airbnb covers.
If you're referring to renting out your home on services such as Airbnb, I would recommend looking at what are called Homeshare policies. A few companies that provide them (in addition to the companies you mentioned) are Slice, Progressive, and Allstate.