True, but we are not postulating an employer who's customers prefer not to be served by a pregnant woman.I believe you stated under "normal circumstances" discrimination is disadvantageous. I am not sure exactly what you would consider "normal circumstances", but I was merely giving an example where discrimination would be an advantage.
We are merely postulating an employer who wants his employees to show up for work.
Which can lead to discrimination because a woman may be turned down for a job because of something she has no control over, her ability to become pregnant, regardless of if she actually has plans to become pregnant or not, or is even fertile.
In that case, why bother with any laws on the topic at all? After all, those who do discriminate would continue to do so.
People still murder others even though it's illegal. Why have laws against murder? They obviously don't work.
No, but it does mitigate the harm that her pregnancy causes for her employer.
Isn't the biggest harm losing an employee & having to hire someone new? That happens regardless of leave laws. True it might be less hassle now that they can fire a now expectant mother, but they probably would save themselves even that hassle by not hiring a woman in the first place.