alt Hacker NewsBecause there is much less demand for deathless meat. Milk + eggs + legumes are good enough for many vegetarians. They're even cheaper than real meat in most places. On the other hand, human intelligence, by definition, can't be affordable for someone on a middle income.
Also we still don't really know what we mean by intelligence, even though we've now invented a version of it. You'd have thought that question would need some more investigation before we could build it, but here we are.