https://www.nhs.uk/live-well/eat-well/meat-nutrition/#how-mu...
So basically, raw ingredients of any kind are good to eat, processed food is not so good for you.
However I wouldn't call 500g a proper steak, only time I've seen stakes at that size is as novalty items on menus of burger/grill joints, and even then very rarely.
Since the 1970s, at least:
* Americans eat less red meat and more white meat than they used to in the 70's.
* Americans get fewer calories total from meat than they used to, yet eat way more plant material (hint: carbs) than ever before. https://imgur.com/a/LgqUMJz
* Americans and Brits are way more overweight than ever before, with the obesity "trend" starting in the late 70s or early 80s. Obesity should concern you, it kills 10 times the people that the US opioid epidemic does (300K deaths/year vs 30K deaths/year), but culture makes it much harder to take 10 times as seriously. Or talk about at all for that matter. What's a minute increase in bowel cancer comparatively?
Why fear (unprocessed) red meat in 2018, and why on earth listen to the NHS on the subject? Are people who listen to NHS guidelines actually healthier than people in the 1970's, who ate more red meat?
I'm gonna call BS on this unless you provide a citation.
Many people (in the west) eat a breakfast (cereal, pancakes, waffles, bagel, toast) or lunch (PB&J sandwich, salad) that contains no meat every day or every workday. Then you have to account for all the meals where there is no meat (pizza, mac and cheese). You'd need to have a substantial fraction of the population eating meat (almost) literally every meal in order to make up for the people who habitually don't eat meat at particular meals.
Edit: I'm talking about meat for the purpose of environmental impact and sustainability here. I'm not talking about meat from the perspective of strict veganism or the milk in your coffee or the eggs in your baked goods, those have negligible impact compared to raising animals to slaughter for food.
That's like complaining about oil products used to patch roads in a discussion about the environmental impact of oil.
That's a huge reason why veganism is growing far faster than vegetarianism. People are realizing the systemic connection between the industries and understanding that all animal products must be eschewed.
I'm not denying that one can have meat at every meal if they so desire. I'm saying that as a matter of convenience many do not.
The only fast food place we ever eat at is Taco Bell because you can customize everything to have beans instead of beef. We can't really eat at Chick-Fil-A, Wendy's, etc anymore.