She does have a useful point there, that the main message here is "you should never feel guilty about quitting a job." If someone disagrees with the statement "your company wouldn't hesitate to lay you off if they thought they needed to," they might think that they should feel guilty about leaving.

The key point here is "you shouldn't put the company's interests ahead of your own," but people may parse it as "your manager wouldn't care, so go ahead and quit" and think "but they would care, so I should stay." If A implies B, that doesn't mean not-A implies not-B, but that shape of error is common.