>You'll see in a few years when people with these weird supplement focused diets get older different complications. When you don't drink milk, and don't eat meat, don't eat eggs, and rely on a couple of proteins, you're going to have issues due to calcium and iron issues, especially if you are a woman.

You made that up yourself like it was part of the page you linked lol.

Here's a more relevant quote from the actual page:

"It is not known how much nutrient loss occurs in our diets because of anti-nutrients, and the effects vary among individuals based on their metabolism and how the food is cooked and prepared."

Another quote from the page:

"Studies on vegetarians who eat diets high in plant foods containing anti-nutrients do not generally show deficiencies in iron and zinc."

OK and maybe one more:

"Keep in mind that anti-nutrients may also exert health benefits."

So basically no, anti-nutrients are not worth worrying about.