Some might decide to buy more expensive car or larger house and that's cool choice as well. But in the end will bring you just a temporary happiness and maybe some social status boost.
Screw consumerism, just have a child.
one person's actions can start to move the tide
There are more parents out there that would disagree with that than you might think.
Love your own life, refuse to have children for free!
https://link.springer.com/article/10.1007/s11150-026-09861-1
https://www.economicsobservatory.com/baby-bust
Estimates are that in France and Poland pro-natalist policies have cost around from $1m-2m per extra birth. This is completely unsustainable.
None of which means we shouldn't support families having children, of course we should for all sorts of reasons. It improves health and education outcomes for children, reduces child poverty, and gives women greater autonomy in their choice between work and home life, and overall seems to increase their participation rate in employment.
I think realizing this and taking it into account in family support policies can help us achieve actually achievable outcomes, while avoiding sinking money into unachievable ones.
Unions and Fight for your rights, that's what we need
In case of special needs you are correct. But you need to hope that's not the case.
You also entirely skipped the most expensive ones. Feeding them, an expense that's been ever growing in the last decade, much faster than inflation. Education and child care, which the cynic in me, having read you say the problems started when women joined the workforce, thinks this is probably cause you think women should stay home for these - I hope I'm wrong.
I'd be extremely surprised if your budget didn't radically change before and after having kids, even staying frugal and living within your means.
Breast milk substitutes are expensive though, I admit.
I'm not saying your budget doesn't change after having a child. I'm just saying for a price of a special color on car, vacation and couple nights out, you can afford to have a child for a year.
It's not cheap, but most of us are blowing money on useless stuff anyway. Some are donating thousands a year to online creator, game microtransactions, drinks in a bar, designer bags, funko pop collections and such.
The lifestyle inflation is real. And thanks to shifting priorities, you might even get yourself into better financial position after a few years, then before having a child.