I think everyone has a issue with the words rather than the meaning.
I have faith (trust in something that I cannot prove) that my grandmothers exist. It is blind because it is something I cannot prove. It's "invisible" trust/truth that I know in my heart is true regardless of what it is called. It's not based on something that I can see hence the reason it's called "blind."
On that note.
Your assurance and conviction does not mean you can see (by your post) what you believe and know is true. Since you cannot see it, it is considered "blind" or invisible. That does not invalidate what you believe. It just means it's not tangible.
Just because god, moses, and everyone can say it is true does not make it visible. It just means you have confirmation of what you believe is true. That doesn't mean it is not blind. You still need faith or a leap of faith/trust to believe in something you say you cannot see (you need trust to believe in something you are blinded by) but having confirmation doesn't make your faith less blind just substantiated by your experiences and testimonies you hold dear. Nothing wrong with that.
Faith is blind or it wouldn't be faith it would be fact. It's like looking into a deep abyss. You have confirmation that there is someone under the darkness that will catch you. Nothing wrong with that. But you still admit that you cannot see through that darkness. That means regardless of whose assuring you what's at the bottom, your faith is blinded until you make that jump. When you make that leap of faith (called blind faith or just faith) you are assured what you believe is true.
But as long as you need faith to believe it and don't claim it as knowledge or fact, it will be blind. Nothing wrong with believing in god by faith. I don't agree with living life off of faith or leap of faith (blind faith). I am sure and know that my grandmothers exist. I don't need faith for that. So it isn't blinded.
However, the christian faith says "hope for things unseen" and it says that what can be seen is not as important as what cannot be seen. Moses couldn't even see god's face. People have been killed for trying to find god and others turned into salt.
So, there's nothing wrong with blind faith. Call it leap of faith or taking a chance or hope. But in the end, because you don't know, it is always something you cannot see. Another word for "not being able to see" is being blind.
Nothing wrong with that, right?