What do you think about the sacrifices parents make when they probably had their children for selfish reasons anyway?

It’s not like 100 years ago when women had less control over their fertility. Women would get pregnant and have to raise whatever children God gave them. Now, people can choose when they have children and how many (more or less) and so they choose to make the sacrifices necessary for raising children, mostly because they feel it will be fufilling for themselves to be a parent

What do you think about this? Does a mom complaining about her terrible pregnancy to bring her kids into this world, and any parent talking about working hard to provide for their kids deserve some sort of special respect when they signed on for exactly that responsibility when they chose to have a child?

I’ll reserve my thoughts on the matter until after some answers come in.