Management has a ton of latitude to run the business as they see fit. The "remedy" for bad business decisions is supposed to be divesting and starting a competitor, not the courts.
Cases like Dodge v. Ford or Caremark are odd because the board was basically not running a business at all: Ford flat-out said he was doing something not for the business, but in support of his philanthropic beliefs. Caremark was so asleep at the helm that they racked up a quarter-billion dollars in silly fines.
Anyone can, of course, sue over anything, but if it's even vaguely legitimate (and the "facts" in Shlensky v. Wrigley are pretty bonkers, IMO), they won't win.
"My ambition is to employ still more men, to spread the
benefits of this industrial system to the greatest possible
number, to help them build up their lives and their homes."
This isn't a business decision; it's an ideological one.It's been argued that if he said less ("No, just no"), or a bit more ("And this will let us recruit the best workers/expand our customer base/etc"), he would have been fine. This commentary lays that argument out nicely: https://openyls.law.yale.edu/handle/20.500.13051/603
I feel like this is in semi-myth territory. Yes, there have been cases where shareholders have sued company leadership because they weren't making them as much money as they could. But it's not quite as clear-cut and well-tested in the courts as you make it sound.