i don;t see the problem
it's just milk, granted it's from a cow who was produced from another cow and there's two cows with the same genetic make up walking about, popping out calves & making milk
aaand that one heifer probably took four others to clone successfully
but it's just milk. cloning is a bad method of livestock production anyway, genetic monoculture and all that."a single disease could wipe every single one of them out" (that said, a few years back nearly every cow in the country was serviced by the same bull, same problem arose) and all that, it's also expensive and AI methods are efficient and cost effective so it'll likely never catch on anyway.
well. not in my lifetime...
milk is milk.
you could always look at it the other way too - we're taking the milk from the cow, that milk should be going to feed her calf - which she had to produce to produce the milk.
instead though, it's now been taken away from her to be fed a more expensive, less nutritionally suited milk substitute, then a high protein concentrate meal, then in just over a years time, it'll be on the table and it's mum will be being serviced again to start the cycle over again

I don;t half babble sh*te when i'm tired...