She will want to do things that he’s not capable of due to his age.

The fuck…? He’s 48… Not 100 years old. What do you think a 48-year-old is like?

Did you even read the article you linked? It literally argues against your point.

The literal first sentence of the article is:

Contrary to myth, the sale of Ben & Jerry’s to corporate giant Unilever wasn’t legally required.

And further down:

This article aims to dispel the idée fixe that corporate law compelled Ben & Jerry’s directors to accept Unilever’s rich offer, overwhelming Cohen and Greenfield’s dogged efforts to maintain the company’s social mission and independence.

Yet in the end, Ben & Jerry’s directors chose to accept a generous offer, even at a cost to the social mission, rather than allow the company’s defenses to be tested. Anti-takeover protections are only as effective as the people positioned to use them.