I know that there are always exceptions and that some, i repeat some, will have problems on a plant diet.
But it will be IMHO a miniscule percent/promile, not a majority.
> there are nutrients in meat that you don't ever get from plants
Plant-Based Diets Are Not Nutritionally Deficient https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3854817/
"More than a half-century of creative marketing by the meat, dairy, egg, and fish industries has produced fears surrounding nonexistent deficiencies, which in clinical practice need no patient monitoring by physicians and dietitians"