To me it is about manners and being respectful of what may be offensive to others.Political correctness and being offensive are not necessarily one and the same!
Personally I don't use the word harvest,but I don't also very often use the word kill.I use the words took or shot or got.Why would I in a conversation with a lady or a non hunter or even an anti hunter show some respect and courtesy by using termonology that isn't as graphic.I have no need to let them know that I can use the word kill and it is my god given right to do so.I know what I did and so do they!
I don't think there is any thing wrong with not offending someone when you havea choice in the matter.Not very many people have grown up where they witnessed and participated in the process of bringing an animal to the table from start to finish.I don't disagree that folks should have more of an awareness about the process and if the opportunity is given I will tactfully participate in the discussion.
To influence people you have to meet them where they are and then tactfullybring them your way.