We want, therefore we get

I'm reading a book by Richard Dawkins called "The Greatest Show on Earth: The Evidence for Evolution". Progress has been very slow but it is an insightful book, from what I've managed to read so far, especially for those with scientific curiosity and love for Biology.

Humans are driven by the inherent quality to manipulate their surroundings for selfish gains. Otherwise, how might one explain these?

Bulldogs - these pedigree dogs are carefully bred to maintain their characteristic traits. However, their physique also makes them prone to various health complications, such as breathing difficulties, pug dog encephalitis, abnormal verterbral growth, weakened immune system, painful births - some of which have to be "resolved" by euthanasia.

Belgian Blue cattle - a defect in it's genome that codes for accelerated muscle growth is maintained by selective breeding, resulting in highly marketable beef. Downsides (to the cow) include painful births (which have to be avoided by caesarian births) and, of course, existing solely for the purpose of meat.

In the grand scheme of things, where "progress" is measured in instant gratification and size of benefits, what purpose does morality serve?