You could do online check-in to choose a seat. So why doesn’t El Al just have a section where you select your gender, and then people will know if they want to sit next to them.
And it’s not because they’re anti-religious, because it’s in their best interest. These things happen every day, the stewards are almost undoubtedly tired of the whole thing, their planes become delayed (whatever), and it’s not such a hard thing to do. definitely a lot easier than havingkosher meals.