Actually, most people throughout human history have done just that. Being squeamish about seeing animals getting killed is a pretty modern development, at least outside nobility.
And even today, most people in the world likely still participate occasionally in the slaughter of animals, as this is still routine in all rural areas of the world, even in the US and Europe.
Yeah, I perfectly know. But at the same time we used to beat children (and in some places and some persons still do) to educate them and now this is not welcomed anymore. So, society changes, morality changes over time, things we didn't do, now we do. Things we didn't have the tech to do, now we do have and that can lead to further changes in our morality.
And even today, most people in the world likely still participate occasionally in the slaughter of animals, as this is still routine in all rural areas of the world, even in the US and Europe.