Because the disruptor might succeed with or without them and the disruptor might treat them more favorably (at first) than the status quo. My neighbor grows so

Because the disruptor might succeed with or without them and the disruptor might treat them more favorably (at first) than the status quo. My neighbor grows soybeans, and he hates the guy who buys his soybeans. If someone came in and treated him better and paid him more, I think he'd leap at the chance to sell his crop to them even if it imperiled the future. Besides, suppliers aren't monolithic. Many suppliers are scrapping for new business or ways to differentiate themselves. Better farmers could be more successful in a paradigm where they could earn extra money for healthy plants than say selling to walmart who simply pays a fixed price if the plants meet minimum standards.