I agree with your broader point- one shouldn't tell others that their life isn't worth living. But I'm afraid maybe you're downplaying the struggles a poor Bangladeshi have to go through.
I currently live in Bangladesh. And my father made a off-handed comment few days ago about how there isn't many "thin" people in our village anymore. When he grew up in 60s, a big chunk of our village people didn't have two meals regularly, people dying of hunger wasn't so uncommon. Just two days ago a doctor friend told me hundreds of people die in his hospital every week due to lack of proper equipment. I have several times witnessed the heartbreaking scene in pharmacies where people ask for the price of a medicine, and then turn away without buying anything after hearing the price.
Overpopulation at least partly contributes to this, if not the biggest contributor. It may not be a global problem, but it definitely is a problem for a country like Bangladesh (and maybe India too). I'm not saying this people's life is worthless, but I would definitely not want a new generation of people to go through this.
Population control here is not just the pragmatic and necessary option, it's also the most humane thing to do.