They see that meat production has issues yet don't ever acknowledge those of the arable industry. I'm not the only one to post this here and yet... tumbleweed.
Global warming, loss of habitat, loss of local crops, air miles, orang utan...
The issue for me is that concerns about arable farming are often no more than whataboutery. Countless times I’ve seen people on these threads defend eating meat by saying ‘what about the problems with crop farming?’ - they don’t actually care about crop farming, they just want to deflect from the issue of meat consumption.
The reality is that animal agriculture takes up a disproportionate amount of land / resources in comparison to the calories it produces. If we weren’t growing feed for animals and using land for grazing, we could produce far more calories per acre than we currently do.
Consider soya - one of the most environmentally problematic crops, and one which people love to bring up as a ‘gotcha!’ for vegans and vegetarians. But 70% of the world’s soya crop is fed to animals.
As for air miles, you might be surprised at just how little these impact on the overall carbon footprint of a food product - ourworldindata.org/food-choice-vs-eating-local
I’m very conscious about the impact of the plants I eat. I have a chart on my fridge showing when various fruits and veggies are in season and I stick closely to it. I only buy organic, and a lot of what I buy comes from an organic stall at my local farmer’s market, or the farm shop a couple of miles from my house. I know I am in a very privileged position to be able to do this; I’m only mentioning it to show that I do care a lot about the impact of crop farming.
But I’m sceptical of meat eaters who express concern about the environmental harm of arable crops when they won’t give up meat, which has a vastly more significant impact. It’s hard to see it as anything other than an attempt to divert attention away from a habit they don’t want to give up. I’m not saying that’s true of you at all - just that it might explain why there is sometimes an apparent reluctance to engage with people who think meat eating is defensible but appear to have strong moral objections to arable farming.