SfB – your reaction to the Roosevelt quote says a lot about you and your prejudices I’d argue. I read it as a reaction against people who do nothing and prefer simply to critise/complain/say that things can’t be done rather than advocating throwing yourself down a vertical slope to prove that they’re ‘macho’. You don’t have to take the whole thing literally (particularly the ‘almost died’ bit) for it to have relevance beyond the obvious.
In fact, by getting out mtbing, taking your photos, and dare I say, even inspiring some other people to get out riding with your Bog Trotters group, you’re actually one of the people that the quote is giving respect to and I suppose that you seem to suggest should be classified as macho – ie people who do get out and do stuff.
(and FWIW, I’m a moderate thrill seeker – you won’t see me throwing myself off any big drops/etc but I do like a good bit of fast singletrack that pushes your skills a bit)