I too share your feelings that I don’t want to make some flipper a bunch of money. But the bottom line is the bottom line. Whoever is offering a better deal on a house is going to be the one that I want to buy from. (Of course, better yet, wait and let them squirm for a while trying to sell their house, and let prices come down before buying.)
The other side of this is that most current owners aren’t offering their homes at very attractive prices yet. (a few, but not many) Whereas big builders have started to discount. And the worst priced homes seem to be from flippers who are in denial. Thus, if I pay attention to the bottom line, a builder is probably the best deal, while flippers are the worst.