The human body is adaptable and there is a range of acceptability. We are not robots.
And no where, unless I missed it, was age factored in. My 26 year old self rode a much more aggressive position than my 66 year old self. I just can bend that low anymore. Nor do I want to.
Was there a discussion of riding style? Endurance/recreational rider or time trialist? Criterium specialist or climber? Loaded touring?