I've always been in favor of it but since I have joined the workforce I'm kinda on the fence if not against it.
The amount of people exploiting it is enormous (at least where I live). I have seen some time up precisely their pregnancies to maximize time off work, but still getting paid 100%. Others getting pregnancy leave while planning to resign the day they have to come back to work, sucking up all that their employer has to give and then leaving him.
Employer bias exists for a reason, and it is precisely the existence of this behavior.
The ways in which a system like this can be exploited, in my opinion, are countless and far outweigh the benefits. And since maternal leave is paid for with tax money, I as a taxpayer, am against use of public money to fund private activities.
If anyone, be a male or a female has no mean of having a family due to poor financial planning, it is not my problem to solve.