@Corals, yea I agree with alot of what you wrote in your post but I disagree with some too because it isn’t black and white for many ever with plant ingestion. 
absolutely agree as our food got worse thru processing and chem crap and more…along with general lifestyle/environment, etc, the decline of the entire population and more trigger disease such as diabetes and general malady hit the population.
It is the oxalates in spinach. You can’t pick just insulin issues when chatting plant toxins at all. It is what that particular plant toxin does in your body.
It’s isothiocyanates and sulforaphane for broccoli.
Insulin resistance is not the end all be all of anyone.
Of course humans can deal just as Vic said. Plants are our backup survival food method when healthy meat is not available. Nature gave us 2 ways. The body requires ONLY protein and fat for survival. Basics of life. Not one carb is required ever. But of course carbs can be processed for survival and that is a very good thing or none of us would be here today LOL
Vic’s post, I second all he said on it.
Where a person is on age, other health issues, our stress environment and more come into play also but age to me is a biggie. Alot of plant toxins we do ingest take time to build. A plant has thorns and more for protection but they can’t run, they need internal toxin loads to stay alive, thru bitter taste, real poisonous factors and more as we know.
So in the end, carnivore is the purest food intake one can survive on without loading any plant toxins into their body and like Vic said, when going carnivore so many older (and now the younger have alot of joint pain also!!) find that just being off plant intake has taken them out of misery…but again, like Vic said, a more extreme low carb menu be it just LC or a ‘follow keto macro guidelines’ the probably the easiest and best form of eating out there for every human.
My choice is not carnivore just because I am a meat hound. Plants give me all kinds of issues that I left by the wayside as I dumped them and plus, in all honesty the taste sucks rocks. I always knew I could live without one veg in my life and when I researched I could thru what the body requires, yea, I dumped all veg like a hot potatoe 
and also no one who doesn’t go all in carnivore will never know the health improvements they could have but if some try zero carb, and find they are in a better place on what little they can add back…like a few berries or fruit, or some veg they do like to ‘round out’ their eating experiences for long term to suit them…then cool. It is a good thing.
Like Vic I want to keep my such improved mental clarity, my anxiety levels down to almost nil now, no joint pain anymore to the level I had it, my improved thru the roof energy levels, my gut/bathroom issues are stellar! and a ton more benefits I received from carnivore just by dumping plants from my life.
Will all need this? Nope. But you can’t deny all plants carry a toxin level. It is real. It is science truth. It is fact. But how they react to all individuals over time is personal.
I agree with you a look at our entire lifestyles now is key.
But I also know that ‘we are what we eat’ holds alot of big truth and it is one that I sure agree with.