I don't to around telling vegetarians etc that while not intelligent in the sense animals are, plants are alive and kept alive while we chop and cook them. Salad is still alive when you are eating it
Bully for you, cheep, but if I had a pound for everyone who has chirped, with a big, elbow-in-the-ribs, Ho-ho, here's something you'll never have heard before expression, 'Oh, that carrot felt PAIN when it was pulled up!' I'd be rich.
The OP has clearly met some tiresome food bore vegans, but to be perfectly honest, I've been vegetarian for my entire adult life, know a lot of vegetarians and vegans in several countries, and I don't think I know one who ever talks about what they eat (apart from in the most strictly 'need to know' sense, if someone new invites you for dinner) because of the predictable responses.
The other main strand of responses, apart from defensive chippiness from people who worry about carrot welfare, is puzzlement that I am not actually bursting into tears at the sight of them sitting across the table eating a steak, while whimpering about the cow that died for their meal. Those are the people who think all vegetarians are sentimental anthropomorphising animal lovers who think of farm animals as fluffy ickle kittens.
Deal with the fact that people think your food choices are morally wrong. I used to regularly see (she was a friend's granny) an elderly Jain who was horrified by the fact I ate root vegetables. She didn't preach (mostly, I suspect because we didn't share a language, really!), but she looked deeply wounded.
Diet bores (in the weight-loss sense) are far more widespread than vegetarian or vegan food bores, but seem far more tolerated.