Sorry, I'm not one of those people who views man made as equaling horrifying poison. People can grouse about GMO crops, pesticides, fertilizers, etc all they want, but the fact is, our civilization as it stands exists because of the extra production possible due to farming science improvements. You simply cannot produce nearly as much food via organic methods, end of discussion.
Would I feel a need to be one of the first to brew with manmade yeast? Nope. I don't get to brew enough as is, so I would wait until the practice was established and the flavor profiles had been dialed in a bit. Now, assuming that consumer feedback was that the yeast made as good (or better) beer, and the price point was reasonable, I would happily brew with it.