We support a common police force because it makes sense that government has a monopoly on force. If private security forces did the job of police, that person or persons employing the private force would be a society unto themselves, not a part of the same society as the rest of us, and when conflict developed between their police and the common police (or the police of a 3rd party -- another private security force), then we would be at war. In other words, you don't understand why everyone in society supports the police.
I largely agree now -- in fact I think that women and men (since it's the 21st century and all types of people go on maternity leave) should be able to go on paid maternity leave. The leave will be funded by all corporations for social good -- no point in limiting it to the one the person worked for, since a person on maternity leave contributes equally to all of them. Paid maternity leave is a human right, like clean drinking water and fast internet, and I demand corporations provide us with it!
Most developed countries (the USA being the most notable exception) have some form of paid paternity leave as well, ranging from just a few days, to the same level as maternity leave: https://en.wikipedia.org/wiki/Parental_leave
Where the state provides some or all of the financial assistance for parental leave, one could argue that it is already funded by all corporations, as it would be derived from tax income.
Why should the company provide maternity benefits and not the state? I don't think it's fair for some three person startup to go bankrupt because employee #1 got pregnant and continues to draw down salary while staying home.