They may be willing to acknowledge your question and answer it with a whispered "yes", if you at least ask it in a way that cause them no excessive shame. Your denialism that the answer could be yes isn't quite the same thing as it being an "obvious no".
We all wander through a landscape of horrific truths that we blind ourselves to just to remain sane.
I get that some folks feel bad about human's impact on the earth, but you're going down a very concerning road here. I'm glad I was born, and I'm glad my child was born. I would love for us to move quicker towards a world that isn't trashing the earth like we are now.
I do however get a little concerned about the opinions of those who wished humans existed in far fewer numbers, especially when that involves a wish for a mass die-off (or cull!). You (or whomever) are free to hold whatever opinions you like, but when people start talking about advocating for allowing or promoting the death of large numbers of people, that's when I ask you to politely fuck off.
Do we need population control? For the vast majority of industrialized countries their birth rate is and has been well below replacement levels for decades. We're going to have a much smaller population pretty soon, and there's nothing anyone can do to change that now.
We'll see what plays out in the next few decades, but you've effectively already going to have what you're calling for. I don't think it's going to be a fun situation though - demographic collapse is no joke. Cutting down the replacement population numbers from there just seems like you'd be making a bad situation worse.