Humans should lay eggs - eviltoast

-Easier birth control: Make the egg into an omelette

-Relaxed child support laws: Requires deliberate decision to incubate the egg

-Clean packaged periods: Egg = No mess!

Although, there would be stories about partners hiding fertilized eggs: Instead of unplanned parenthood we would have unconsensual parenthood

There’s probably more nuances I am missing. But do discuss it in the comments.