I would buy a "tool" that solves a problem significantly better than its competitors, but I usually ditch options that are marginally better o cheaper if I feel a personal moral conflict.

Just to honour the Godwin law, take the Eduard Pernkopf anatomy manual as an example, a fascinating example of this discussion.

There is always a tipping point where practicality beats purity, and I think it's ok trying to stretch it, respecting other's choices in the way of course. No need to judge.