You're referring to the Christian concept of blind faith and anyone can appreciate why that's flawed, if you do have reason and certainty in what you believe then you have no foundation to believe in it and can never state it to be true.I don't even know why people feel like proving God's existence when you guys are supposed to believe in God. In m y opinion that's pure insecurity, trying to prove Atheists wrong by proving something.
I had a discussion similar to this a few days ago. I tried to use the natural selection Argument but a believer said that "natural selection could not exist without a creator".
I was like
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Why has everything to have a creator?
And why proving God's existence?
Not everything has to have a creator but this reality does since it's a casual reality being finite and dependent.