Hi @Barbara240, and a good reply from @Sue-and-Andrew0.
It's not actually "unfair" at all. It's not a penalty, it's a bonus for those who can just book and move along. Think about it: Instant Book works in so many ways--Less work! Fewer communications for you, fewer communications for the guest (BIG ONE), fewer things for AirBnB to handle. Lot less work, everyone makes more $, gets more bookings... Tough to argue with this, eh?
For those who want, need, or actually enjoy the extra interactions, everyone has to want it. Not just the host. Not just the guest, and this was the concept AirBnB was founded upon! But not everyone enjoys the screening process or feels they want to invest the time in it.
If you prefer more bookings and don't care so much about the social/cultural interaction, IB makes sense and it will absolutely make you more revenue. A bonus.
Kim