In "Constantly Risking Absurdity," there's no turning back. If the poet does turn back, not only does he risk disappointing his audience, but he almost guarantees the very "absurdity and death" he's constantly risking. So he has to persevere, keep his balance on that figurative high wire, and do his very best to maintain his sight of Beauty. After all, it's all of "his own making" and there's no one else to depend on but himself and his skills.
If those "eyebeams" from the audience were real, the poet would have a whole different perspective on persevering.
As a "super realist," the poet not only averts death but also perseveres in a superhuman way.