Disclosure: I'm a former Christian, now an atheist.

It's true that the people discussed in Hebrews 11 were said to have met and spoken with God. But, unless I'm missing something, the chapter still seems to say that present-day believers must have faith in a God they've never seen; verse 6 says that anyone who comes to God must believe that he exists, which to me implies that they haven't met him as the early believers did. So this still seems to require some kind of leap of faith, beyond the evidence available to us today. I'll leave it at that, since we clearly disagree.