Aries,
I woud like to be able to tell you that all Airbnb hosts are great (and the vast majority of them are great).
But not 100% of the hosts are great. The way the great hosts get separated from the not-as-great hosts is the guest reviews.
If you have a listing with many, many great reviews, you can be confident the place will be as promised, and the host will do a good job.
If a listing is brand new and has no reviews, it might be great... or it might not be so great.
You don't know.
If you want certainty, you really should choose a listing with a lot of good reviews.
If you do not mind taking a chance, then new listings can be terrific.
But you don't know for sure.