Wishful thinking.
That’s why Monsanto unleashed

crops and pesticides that are both poisonous to humans.
Wishful thinking.
Also known as greed.

Daniel Charles wrote for The Salt 11 March 2012,

Why Monsanto Thought Weeds Would Never Defeat Roundup,

First, the company had been selling Roundup for years without any

problems. Second, and perhaps most important, the company’s
scientists had just spent more than a decade, and many millions of
dollars, trying to create the Roundup-resistant plants that they
desperately wanted — soybeans and cotton and corn. It had been
incredibly difficult. When I interviewed former Monsanto scientists
for my book on biotech crops, one of them called it the company’s
“Manhattan Project.”

Considering how hard it had been to create those crops, “the
thinking was, it would be really difficult for weeds to become
tolerant” to Roundup, says Rick Cole, who is now responsible for
Monsanto’s efforts to deal with the problem of resistant weeds.

So they thought small scale would be the same as saturating
90+% of every corn, soybean, peanut, and cotton field in the U.S.
and numerous other countries with virulent poisons.
Because they wanted the money.

-jsq