The way I/we know all this is because GOD told us through His word. People didn’t just make it up playing that “what if” game, God said it and it is why we CAN believe it and build our faith upon it.
So your faith is in the bible, not God... like I have said..
You’re not alone.. many worship the bible...
Some worship their “church”... others worship saints and artifacts.. etc..
So worshiping bible lore is quite normal...
Jesus never said read the bible.. but go to the Holy Spirit..
That takes faith to believe in and follow the Holy Spirit.. an “invisible friend”..
True the bible is visible tangible literal... like an idol.. so I understand that..
Following the Holy Spirit you have no need of bible lore..
except as entertainment...
for more than 1500 years since Jesus MOST people could not read.. or wanted to...
Seems to me a silly God would require reading anything to determine anything..
Would take a weak God for that....
Most people I know.. and have known treat the Holy Spirit as a doofus.. a go-fer..
I think the HS knows where your faith lies.. textual or in statutes, artifacts or amulets(totems)..
You know... is Not a doofus....... knows “whats happening”..
My faith is in God alone and, because it is, I know I can trust the sacred Scriptures HE commanded to be written and which HE preserves so that we can have an objective authoritative rule of faith to know truth from error. Lots of people think they are relying solely on the Holy Spirit, because they are trusting in their OWN feelings, however, we can know that when someone feels something is true the only way to KNOW if it is is to go to the objective and authoritative rule of faith, the Bible. It alone contains what holy men of God spoke as they were carried along by the Holy Spirit - that SAME Holy Spirit you seem to think didn't "need" to lead men to write.
If you want to trust in your own feelings or those of others whom you are convinced have the right feelings, then go ahead, you have that freedom to choose for yourself what master you follow. However, I also have that freedom and I have decided long ago that I can trust what God's word says because heaven and earth (those things you can feel) will pass away but His word will NEVER pass away. It remains the ONLY offensive weapon in the spiritual warfare going on all around us - the Sword of the Spirit which is the Word of God. Whether or not someone can read it doesn't change that fact.