This’ll just delay most ElAl flights since the flight attendants can no longer assist finding new seat assignments for men and women wishing to sit next to the same gender, what’ll now start happening at the beginning of every single ElAl flight is that you’ll have a 100 men and women going around themselves politely asking other passengers if they’re willing to swap seats until they find a kind passenger willing to make the swap.
Since everyone will be doing it on their own at the beginning of each ElAl flight without using the staff, it’ll take much longer till everything settles and the flight can take off.