True - no one has ever seen God as He is, but what about those who have never been exposed to formalized religion of any sort - would they be able to know that a Creator exists independent of someone evangelizing them?
I beg to differ. Everyone has seen God as He is ... right in front of us, within us ... all of us, every moment of every day. All around us, all the time.
Just that we tend to focus only on our immediate surroundings and existence, but that doesn't mean that 'God as He is' isn't everywhere at once and completely within His creation
Prior to the Ascension of Jesus into heaven, He told the disciples that He would no longer be with them in the flesh. The disciples were worried about how they would carry on. Jesus told them that they would have to have faith in Him.
Jesus also told the disciples to spread His Word to everyone, every tribe, every nation. Jesus made no mention of previous religious experience as being a requirement for His grace and salvation.
Faith in Jesus is literally the bedrock of Christianity. We must trust that Jesus is our Savior.
And I trust in Him. Jesus is even more real to me than anything that is tangible to me. And I thank God for Him... as I am so fallen, only Jesus can raise me... and the rest of us.
Romans 1 says yes.