Which was part of my point, above. Birds are incapable of tasting capsaicin at all. So they'd have to be hit with a dose thereof unrealistically larger than any

Which was part of my point, above. Birds are incapable of tasting capsaicin at all. So they'd have to be hit with a dose thereof unrealistically larger than anything they'd ever encounter in their natural environment before it begins to cause problems for them, and at that point, other compounds in the peppers probably would've started causing problems long ago. And so, they happily eat the tasty seed pods which the plant so helpfully color-coded as edible, and then poop the seeds around their environment, thereby helping those tasty plants become more numerous.