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What evidence do you have to support the idea that people "did it with 'no problems'"?Familiarity with history and humans? Being from a rural area myself, and having seen tons of people (including my grandparents) do it, and having travelled all around the world?
Really, you'll contest that the majority of people killed and ate animals themselves (without some specialist to package them for them) for most of recorded history and still do in tons of places?
>Why does the profession of a "Butcher" exist?
For the same reason that the profession of a cook exists, even though people cook themselves all the time too, and used to cook even more so back in the day.
As with tons of other professions, because cities and towns first and foremost.
Note that the "profession of a butcher" in most rural areas around the world either didn't exist at all as something specialized, or was a place one rarely visited, and only if they didn't have land and/or animals of their own.
Because almost everybody (and surely many more than actual framers, cattle raisers etc) had their own animals, for eggs and wool and occasionally (as it was quite expensive and a treat) meat, not everybody did.
>How about Hindu's, Buddhists etc?
These have sacred animals (and some of them, not all), or religious diets. Those have existed since forever (also fasting certain foods for certain times).
But since you've asked:
A vast majority of Indians ate meat regularly and meat eating was never prohibited in ancient India. Certain sections of society and some ascetic traditions practiced vegetarianism both for religious and spiritual purposes, but it is not true that they constituted the majority.
Meat-eating is strictly prohibited in Jainism, whereas it is conditionally allowed in Hinduism and Buddhism. In all three religions, the rules regarding meat eating are established according to their beliefs regarding karma and virtue such as nonviolence and compassion
Hindu law books prescribe rules for meat eating for the four castes and specify which type of meat is allowed for human consumption and under what circumstances. Buddhist texts also lay down rules for meat eating by the monks.
However, as time went by, meat-eating became a more restrictive practice in both Hinduism and Buddhism. Presently, vegetarianism is a fashion and a vanity among the elite and the middle class Hindus. They may not perform sacrifices, worship gods, or practice virtues such as honesty, compassion towards fellow human beings, charity, etc., but would make sure that everyone knows about their preference for vegetarian food because it is the current trend and gives them an aura of superiority in a community that has taken to the filmy practices of pseudo culture and hybrid lifestyles.
http://www.hinduwebsite.com/hinduism/concepts/meat-eating.as...