Which wasn't the statements made by employees of Fox News. Perhaps if they had made such a statement they wouldn't have paid out several tons of money.
First, that’s not the same as what fox news alleged - if they’d simply run a “hacker x reported being able to alter the software” story they’d have been in the clear legally.
Second, elections are systems, not individual voting machines. Someone being able to tamper with unlimited physical access is not the same as being able to do so in an actual election (e.g. your bank’s PC probably aren’t perfect either but you can’t just sit down and start hacking them), and that’s only a small part of the actual system - as a simple example, if someone could make it record a vote for a different candidate than you tapped, it’d be caught by your review of the paper ballot which is actually counted. If they messed with the counting system, a hand recount would show huge discrepancies.
The underlying thing to remember here is that nobody seriously believed there was a problem. They started backwards from the desire to pretend Trump didn’t lose and repeated conspiracy theory after conspiracy theory as needed to say that outcome was real. That’s why they lost the lawsuit because it was clear that it was essentially political advertising pretending to be news, with complete disregard for the truth. That also forced the lawsuit since left unchallenged the smear campaign would have harmed Dominion’s business, whereas if there’d been anything factual the company would have been compelled to fix a real problem.