Because it's only a matter of time before the tide turns. They know marijuana can get the same results most of their medications can, for less and with less side effects. That's why they fight the hardest and spend the most to oppose legalization. As medical marijuana continues to get legalized in more states and more people turn to cannabis based medications they will have to join the club. And why start from scratch when you have the money to buy technology that's already there, like a huge database linking ailments to what strains will alleviate them. Or, a company already involved with marijuana like GW Pharm, Zynerba, Insys, etc., who want to expand their technology. Yaz has already turned down buyout offers in the past, maybe he won't in the future.
