Noone has to do anything.

The original tweet essentially said that all women have a mission from God to use their bodies to make babies. At the very least it's a value judgment on how women live their lives.

There seems to be a sustained campaign against having kids.

I have never encountered this. There is absolutely a sustained campaign for bodily autonomy, and for the acceptance of people who choose not to reproduce; but I haven't encountered anyone talking like the original tweet, saying women have a mission from God to not have kids or something.

This is just fighting against the natural way of life.

Here we go again with imposing judgements on people who don't reproduce. I feel like that's the bigger 'sustained campaign' in this conversation. The natural way of life changes over time, it used to be natural to die young from a bacterial infection, or to have your village sacked by marauders. We don't need to have the same pressures to keep reproduction high as in the past. Populations are still increasing, but people are out here blaming women for not doing it faster? Just take a breath, it's going to be okay.