Well this is nonsensical for a myriad of reasons, including that a derivative that was patented and proven to work would just encourage people to take the cheap

Well this is nonsensical for a myriad of reasons, including that a derivative that was patented and proven to work would just encourage people to take the cheap generic that also works but is more widely available and has better understood risk profile, but it does show potential motive as to why it's taken this long to get real RCTs spun up to study ivermectin.