Indeed Jesus did not hand us a book, rather He handed the keys to His disciples, and commissioned them to teach the Gospel to others and to baptize the nations of the world. Through them, the Church foundations were made, and if you are not in this Church, then where are you?
Probably because following the “Bible alone” is not taught in the Bible.
In fact, the Bible teaches to follow the Church founded by Jesus Christ and his Apostles back in the 1st century AD.
The “Bible” is never even mentioned in the Bible. While the Church is mentioned several times over.