Here are just a few reasons (adapted in part from Albert Bates book, The Biochar Solution)
Because you understand your dependence upon agriculture and want to better understand how biochar benefits soil by stimulating microbial activity, attracting fungi and distributing nutrients to the roots of plants, much as a coral reef supports the ocean. You'll also want to know how the micropores in biochar provides a "reservoir and conduit for soil moisture, soaking up water from over-saturated areas and giving it back to dry areas"
Because you care about sustainable agriculture and want to learn from others addressing the complex challenges of preserving ecosystem services, enhancing soil fertility, increasing water absorption while decreasing the amount needed, employing human and animal labor, as well as sequestering carbon.
Because you worry about the complicated and unsustainable use of fossil fuels and want to explore energy alternatives. You want to see solutions that successfully address a rigorous life cycle analysis with full disclosure and transparency.