@John1574 I have never used Instant Book, because like my guests, I want to get a feel for someone before approving them to stay in my house. I know this results in a poorer search ranking, and less bookings, but like you, I don't rely on airbnb to pay my bills or put food on the table.
I credit not using Instant Book for me never having had to cancel a booking or decline a booking request, never having had an issue with a guest that couldn't be resolved amicably in the moment, and all my guests have been great and given me lovely reviews and 5 stars. (fingers crossed this continues)
Instant Book seems to work fine for a lot of hosts, and those who depend on the income seem willing to spend time dealing with the issues it can create, but from reading this forum, also seems to lead to issues with guests who haven't bothered to read the listing description, don't know that 3rd party bookings aren't supported, having to cancel bookings one doesn't feel comfortable with, spending time dealing with airbnb to try to resolve issues, etc.
I prefer not to complicate my life- I'm quite busy enough with things not related to hosting.