it's really bad to think that proper child-rearing somehow a burden

I’m probably misapplying dialectical materialism here, but whatever it’s kinda fun: there are inherent contradictions even in parenting. I have multiple young kids. I can tell you, it is hard. Not a burden, but it’s hard a lot of the time. If you see me in the store with them I will probably look exhausted and overwhelmed. And in the moment, it might even feel burdensome. But my kids are awesome and I wouldn’t trade being a parent for anything. Trying to raise them right is my #1 life goal and it’s incredibly rewarding to me (but not rewarding to everyone, I should clarify that point. If you know you don’t want kids you probably shouldn’t IMO). But the burden/reward is dialectically related. Those little humans just love you so much and are dependent on you for everything. That takes a lot out of you but also makes it all truly a joy even if there are moments when I can’t see it.